content_switches.cc revision c5cede9ae108bb15f6b7a8aea21c7e1fefa2834c
1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#include "content/public/common/content_switches.h" 6 7#include "base/command_line.h" 8 9namespace switches { 10 11// The number of MSAA samples for canvas2D. Requires MSAA support by GPU to 12// have an effect. 0 disables MSAA. 13const char kAcceleratedCanvas2dMSAASampleCount[] = "canvas-msaa-sample-count"; 14 15// By default, file:// URIs cannot read other file:// URIs. This is an 16// override for developers who need the old behavior for testing. 17const char kAllowFileAccessFromFiles[] = "allow-file-access-from-files"; 18 19// Allows loopback interface to be added in network list for peer connection. 20const char kAllowLoopbackInPeerConnection[] = 21 "allow-loopback-in-peer-connection"; 22 23// Enables the sandboxed processes to run without a job object assigned to them. 24// This flag is required to allow Chrome to run in RemoteApps or Citrix. This 25// flag can reduce the security of the sandboxed processes and allow them to do 26// certain API calls like shut down Windows or access the clipboard. Also we 27// lose the chance to kill some processes until the outer job that owns them 28// finishes. 29const char kAllowNoSandboxJob[] = "allow-no-sandbox-job"; 30 31// Allows debugging of sandboxed processes (see zygote_main_linux.cc). 32const char kAllowSandboxDebugging[] = "allow-sandbox-debugging"; 33 34// The same as kAuditHandles except all handles are enumerated. 35const char kAuditAllHandles[] = "enable-handle-auditing-all"; 36 37// Enumerates and prints a child process' most dangerous handles when it 38// is terminated. 39const char kAuditHandles[] = "enable-handle-auditing"; 40 41// Blacklist the GPU for accelerated compositing. 42const char kBlacklistAcceleratedCompositing[] = 43 "blacklist-accelerated-compositing"; 44 45// Blacklist the GPU for WebGL. 46const char kBlacklistWebGL[] = "blacklist-webgl"; 47 48// Choose which logging channels in blink platform to activate. See 49// Logging.cpp in blink's Source/platform for a list of available channels. 50const char kBlinkPlatformLogChannels[] = "blink-platform-log-channels"; 51 52// Block cross-site documents (i.e., HTML/XML/JSON) from being loaded in 53// subresources when a document is not supposed to read them. This will later 54// allow us to block them from the entire renderer process when site isolation 55// is enabled. 56const char kBlockCrossSiteDocuments[] = "block-cross-site-documents"; 57 58// Causes the browser process to throw an assertion on startup. 59const char kBrowserAssertTest[] = "assert-test"; 60 61// Causes the browser process to crash on startup. 62const char kBrowserCrashTest[] = "crash-test"; 63 64// Path to the exe to run for the renderer and plugin subprocesses. 65const char kBrowserSubprocessPath[] = "browser-subprocess-path"; 66 67// Dumps extra logging about plugin loading to the log file. 68const char kDebugPluginLoading[] = "debug-plugin-loading"; 69 70// Sets the tile size used by composited layers. 71const char kDefaultTileWidth[] = "default-tile-width"; 72const char kDefaultTileHeight[] = "default-tile-height"; 73 74// Disable antialiasing on 2d canvas. 75const char kDisable2dCanvasAntialiasing[] = "disable-canvas-aa"; 76 77// Disables client-visible 3D APIs, in particular WebGL and Pepper 3D. 78// This is controlled by policy and is kept separate from the other 79// enable/disable switches to avoid accidentally regressing the policy 80// support for controlling access to these APIs. 81const char kDisable3DAPIs[] = "disable-3d-apis"; 82 83// Disable gpu-accelerated 2d canvas. 84const char kDisableAccelerated2dCanvas[] = "disable-accelerated-2d-canvas"; 85 86// Disables accelerated compositing. 87const char kDisableAcceleratedCompositing[] = "disable-accelerated-compositing"; 88 89// Disables accelerated compositing for backgrounds of root layers with 90// background-attachment: fixed. 91const char kDisableAcceleratedFixedRootBackground[] = 92 "disable-accelerated-fixed-root-background"; 93 94// Disables the hardware acceleration of 3D CSS and animation. 95const char kDisableAcceleratedLayers[] = "disable-accelerated-layers"; 96 97// Disables accelerated compositing for overflow scroll. 98const char kDisableAcceleratedOverflowScroll[] = 99 "disable-accelerated-overflow-scroll"; 100 101// Disables layer squashing. 102const char kDisableLayerSquashing[] = 103 "disable-layer-squashing"; 104 105// Disables GPU accelerated video display. 106const char kDisableAcceleratedVideo[] = "disable-accelerated-video"; 107 108// Disables hardware acceleration of video decode, where available. 109const char kDisableAcceleratedVideoDecode[] = 110 "disable-accelerated-video-decode"; 111 112// Disables the alternate window station for the renderer. 113const char kDisableAltWinstation[] = "disable-winsta"; 114 115// Disable the ApplicationCache. 116const char kDisableApplicationCache[] = "disable-application-cache"; 117 118// Disable limits on the number of backing stores. Can prevent blinking for 119// users with many windows/tabs and lots of memory. 120const char kDisableBackingStoreLimit[] = "disable-backing-store-limit"; 121 122// Disable browser plugin compositing experiment. 123const char kDisableBrowserPluginCompositing[] = 124 "disable-browser-plugin-compositing"; 125 126// See comment for kEnableCompositingForFixedPosition. 127const char kDisableCompositingForFixedPosition[] = 128 "disable-fixed-position-compositing"; 129 130// See comment for kEnableCompositingForTransition. 131const char kDisableCompositingForTransition[] = 132 "disable-transition-compositing"; 133 134// Disables HTML5 DB support. 135const char kDisableDatabases[] = "disable-databases"; 136 137// Disables delegated renderer. 138const char kDisableDelegatedRenderer[] = "disable-delegated-renderer"; 139 140// Disables desktop notifications (default enabled on windows). 141const char kDisableDesktopNotifications[] = "disable-desktop-notifications"; 142 143// Disables experimental navigator content utils implementation. 144const char kDisableNavigatorContentUtils[] = 145 "disable-navigator-content-utils"; 146 147// Handles URL requests by NPAPI plugins through the renderer. 148const char kDisableDirectNPAPIRequests[] = "disable-direct-npapi-requests"; 149 150// Disable the per-domain blocking for 3D APIs after GPU reset. 151// This switch is intended only for tests. 152extern const char kDisableDomainBlockingFor3DAPIs[] = 153 "disable-domain-blocking-for-3d-apis"; 154 155// Disable experimental WebGL support. 156const char kDisableExperimentalWebGL[] = "disable-webgl"; 157 158// Disable the fast text autosizing implementation. 159const char kDisableFastTextAutosizing[] = "disable-fast-text-autosizing"; 160 161// Disable FileSystem API. 162const char kDisableFileSystem[] = "disable-file-system"; 163 164// Disables sending filters (SkImageFilter objects) between processes over IPC 165const char kDisableFiltersOverIPC[] = "disable-filters-over-ipc"; 166 167const char kDisableFixedPositionCreatesStackingContext[] 168 = "disable-fixed-position-creates-stacking-context"; 169 170// Disable 3D inside of flapper. 171const char kDisableFlash3d[] = "disable-flash-3d"; 172 173// Disable Stage3D inside of flapper. 174const char kDisableFlashStage3d[] = "disable-flash-stage3d"; 175 176// This flag disables force compositing mode and prevents it from being enabled 177// via field trials. 178const char kDisableForceCompositingMode[] = "disable-force-compositing-mode"; 179 180// Disable deferral of scroll-ending gesture events when a scroll is active. 181const char kDisableGestureDebounce[] = "disable-gesture-debounce"; 182 183const char kDisableGestureTapHighlight[] = "disable-gesture-tap-highlight"; 184 185// Disable GL multisampling. 186const char kDisableGLMultisampling[] = "disable-gl-multisampling"; 187 188// Disables GPU hardware acceleration. If software renderer is not in place, 189// then the GPU process won't launch. 190const char kDisableGpu[] = "disable-gpu"; 191 192// Prevent the compositor from using its GPU implementation. 193const char kDisableGpuCompositing[] = "disable-gpu-compositing"; 194 195// Disable the limit on the number of times the GPU process may be restarted 196// This switch is intended only for tests. 197extern const char kDisableGpuProcessCrashLimit[] = 198 "disable-gpu-process-crash-limit"; 199 200// Disable GPU rasterization, i.e. rasterize on the CPU only. 201// Overrides the kEnableGpuRasterization and kForceGpuRasterization flags. 202const char kDisableGpuRasterization[] = "disable-gpu-rasterization"; 203 204// When using CPU rasterizing disable low resolution tiling. This uses 205// less power, particularly during animations, but more white may be seen 206// during fast scrolling especially on slower devices. 207const char kDisableLowResTiling[] = "disable-low-res-tiling"; 208 209// Disable the GPU process sandbox. 210const char kDisableGpuSandbox[] = "disable-gpu-sandbox"; 211 212// Disable the thread that crashes the GPU process if it stops responding to 213// messages. 214const char kDisableGpuWatchdog[] = "disable-gpu-watchdog"; 215 216// Suppresses hang monitor dialogs in renderer processes. This may allow slow 217// unload handlers on a page to prevent the tab from closing, but the Task 218// Manager can be used to terminate the offending process in this case. 219const char kDisableHangMonitor[] = "disable-hang-monitor"; 220 221// Disable the RenderThread's HistogramCustomizer. 222const char kDisableHistogramCustomizer[] = "disable-histogram-customizer"; 223 224// Paint content on the main thread instead of the compositor thread. 225// Overrides the kEnableImplSidePainting flag. 226const char kDisableImplSidePainting[] = "disable-impl-side-painting"; 227 228// Prevent Java from running. 229const char kDisableJava[] = "disable-java"; 230 231// Don't execute JavaScript (browser JS like the new tab page still runs). 232const char kDisableJavaScript[] = "disable-javascript"; 233 234// Don't kill a child process when it sends a bad IPC message. Apart 235// from testing, it is a bad idea from a security perspective to enable 236// this switch. 237const char kDisableKillAfterBadIPC[] = "disable-kill-after-bad-ipc"; 238 239// Disables prefixed Encrypted Media API (e.g. webkitGenerateKeyRequest()). 240const char kDisablePrefixedEncryptedMedia[] = 241 "disable-prefixed-encrypted-media"; 242 243// Disables LCD text. 244const char kDisableLCDText[] = "disable-lcd-text"; 245 246// Disable LocalStorage. 247const char kDisableLocalStorage[] = "disable-local-storage"; 248 249// Force logging to be disabled. Logging is enabled by default in debug 250// builds. 251const char kDisableLogging[] = "disable-logging"; 252 253// Disable rasterizer that writes directly to GPU memory. 254// Overrides the kEnableMapImage flag. 255const char kDisableMapImage[] = "disable-map-image"; 256 257// Disable Pepper3D. 258const char kDisablePepper3d[] = "disable-pepper-3d"; 259 260// Disables compositor-accelerated touch-screen pinch gestures. 261const char kDisablePinch[] = "disable-pinch"; 262 263// Prevent plugins from running. 264const char kDisablePlugins[] = "disable-plugins"; 265 266// Disable discovering third-party plug-ins. Effectively loading only 267// ones shipped with the browser plus third-party ones as specified by 268// --extra-plugin-dir and --load-plugin switches. 269const char kDisablePluginsDiscovery[] = "disable-plugins-discovery"; 270 271// Disables remote web font support. SVG font should always work whether this 272// option is specified or not. 273const char kDisableRemoteFonts[] = "disable-remote-fonts"; 274 275// Turns off the accessibility in the renderer. 276const char kDisableRendererAccessibility[] = "disable-renderer-accessibility"; 277 278// Disables the new layout/paint system which paints after layout is complete. 279const char kDisableRepaintAfterLayout[] = "disable-repaint-after-layout"; 280 281// Disable the seccomp filter sandbox (seccomp-bpf) (Linux only). 282const char kDisableSeccompFilterSandbox[] = "disable-seccomp-filter-sandbox"; 283 284// Disable session storage. 285const char kDisableSessionStorage[] = "disable-session-storage"; 286 287// Disable the setuid sandbox (Linux only). 288const char kDisableSetuidSandbox[] = "disable-setuid-sandbox"; 289 290// Enable shared workers. Functionality not yet complete. 291const char kDisableSharedWorkers[] = "disable-shared-workers"; 292 293// Disables site-specific tailoring to compatibility issues in WebKit. 294const char kDisableSiteSpecificQuirks[] = "disable-site-specific-quirks"; 295 296// Disable smooth scrolling for testing. 297const char kDisableSmoothScrolling[] = "disable-smooth-scrolling"; 298 299// Disables the use of a 3D software rasterizer. 300const char kDisableSoftwareRasterizer[] = "disable-software-rasterizer"; 301 302// Disables speech input. 303const char kDisableSpeechInput[] = "disable-speech-input"; 304 305// Disable False Start in SSL and TLS connections. 306const char kDisableSSLFalseStart[] = "disable-ssl-false-start"; 307 308// Disable multithreaded GPU compositing of web content. 309const char kDisableThreadedCompositing[] = "disable-threaded-compositing"; 310 311// Disables the threaded HTML parser in Blink 312const char kDisableThreadedHTMLParser[] = "disable-threaded-html-parser"; 313 314// Disable accelerated overflow scrolling in corner cases (that would not be 315// handled by enable-accelerated-overflow-scroll). 316const char kDisableUniversalAcceleratedOverflowScroll[] = 317 "disable-universal-accelerated-overflow-scroll"; 318 319// Disables unprefixed Media Source API (i.e., the MediaSource object). 320const char kDisableUnprefixedMediaSource[] = "disable-unprefixed-media-source"; 321 322// Disables prefixed Media Source API (i.e., the WebKitMediaSource object). 323const char kDisableWebKitMediaSource[] = "disable-webkit-media-source"; 324 325// Don't enforce the same-origin policy. (Used by people testing their sites.) 326const char kDisableWebSecurity[] = "disable-web-security"; 327 328// Disables support for XSLT. 329const char kDisableXSLT[] = "disable-xslt"; 330 331// Disables Blink's XSSAuditor. The XSSAuditor mitigates reflective XSS. 332const char kDisableXSSAuditor[] = "disable-xss-auditor"; 333 334// Specifies if the |DOMAutomationController| needs to be bound in the 335// renderer. This binding happens on per-frame basis and hence can potentially 336// be a performance bottleneck. One should only enable it when automating dom 337// based tests. 338const char kDomAutomationController[] = "dom-automation"; 339 340// Enable bleeding-edge code to make Chrome draw content faster. The changes 341// behind this path are very likely to break lots of content. 342// ** DO NOT use this flag unless you know what you are doing. ** 343const char kEnableBleedingEdgeRenderingFastPaths[] = 344 "enable-bleeding-edge-rendering-fast-paths"; 345 346// Disable gpu-accelerated 2d canvas. 347const char kEnableDeferredFilters[] = "enable-deferred-filters"; 348 349// Enables accelerated compositing for backgrounds of root layers with 350// background-attachment: fixed. Requires kForceCompositingMode. 351const char kEnableAcceleratedFixedRootBackground[] = 352 "enable-accelerated-fixed-root-background"; 353 354// Enables accelerated compositing for overflow scroll. Promotes eligible 355// overflow:scroll elements to layers to enable accelerated scrolling for them. 356const char kEnableAcceleratedOverflowScroll[] = 357 "enable-accelerated-overflow-scroll"; 358 359// Enables LCD text. 360const char kEnableLCDText[] = "enable-lcd-text"; 361 362// Enables experimental feature that maps multiple RenderLayers to 363// one composited layer to avoid pathological layer counts. 364const char kEnableLayerSquashing[] = 365 "enable-layer-squashing"; 366 367// Turns on extremely verbose logging of accessibility events. 368const char kEnableAccessibilityLogging[] = "enable-accessibility-logging"; 369 370// Use a BeginImplFrame signal from browser to renderer to schedule rendering. 371const char kEnableBeginFrameScheduling[] = "enable-begin-frame-scheduling"; 372 373// Enables browser plugin for all types of pages. 374const char kEnableBrowserPluginForAllViewTypes[] = 375 "enable-browser-plugin-for-all-view-types"; 376 377// Enable the creation of compositing layers for fixed position 378// elements. Three options are needed to support four possible scenarios: 379// 1. Default (disabled) 380// 2. Enabled always (to allow dogfooding) 381// 3. Disabled always (to give safety fallback for users) 382// 4. Enabled only if we detect a highDPI display 383// 384// Option #4 may soon be the default, because the feature is needed soon for 385// high DPI, but cannot be used (yet) for low DPI. Options #2 and #3 will 386// override Option #4. 387const char kEnableCompositingForFixedPosition[] = 388 "enable-fixed-position-compositing"; 389 390// Enable/Disable the creation of compositing layers for RenderLayers with a 391// transition on a property that supports accelerated animation (that is, 392// opacity, -webkit-transform, and -webkit-filter), even when no animation is 393// running. These options allow for three possible scenarios: 394// 1. Default (enabled only if we dectect a highDPI display) 395// 2. Enabled always. 396// 3. Disabled always. 397const char kEnableCompositingForTransition[] = 398 "enable-transition-compositing"; 399 400// Defer image decoding in WebKit until painting. 401const char kEnableDeferredImageDecoding[] = "enable-deferred-image-decoding"; 402 403// Enables delegated renderer. 404const char kEnableDelegatedRenderer[] = "enable-delegated-renderer"; 405 406// Enables restarting interrupted downloads. 407const char kEnableDownloadResumption[] = "enable-download-resumption"; 408 409// Enables running the SharedWorker inside the renderer process. 410const char kEnableEmbeddedSharedWorker[] = "enable-embedded-shared-worker"; 411 412// Enables support for Encrypted Media Extensions (e.g. MediaKeys). 413const char kEnableEncryptedMedia[] = "enable-encrypted-media"; 414 415// Enable experimental canvas features, e.g. canvas 2D context attributes 416const char kEnableExperimentalCanvasFeatures[] = 417 "enable-experimental-canvas-features"; 418 419// Enables Web Platform features that are in development. 420const char kEnableExperimentalWebPlatformFeatures[] = 421 "enable-experimental-web-platform-features"; 422 423// By default, cookies are not allowed on file://. They are needed for testing, 424// for example page cycler and layout tests. See bug 1157243. 425const char kEnableFileCookies[] = "enable-file-cookies"; 426 427// Enable the fast text autosizing implementation. 428const char kEnableFastTextAutosizing[] = "enable-fast-text-autosizing"; 429 430const char kEnableFixedPositionCreatesStackingContext[] 431 = "enable-fixed-position-creates-stacking-context"; 432 433// Enable Gesture Tap Highlight 434const char kEnableGestureTapHighlight[] = "enable-gesture-tap-highlight"; 435 436// Enables TRACE for GL calls in the renderer. 437const char kEnableGpuClientTracing[] = "enable-gpu-client-tracing"; 438 439// Allow heuristics to determine when a layer tile should be drawn with the 440// Skia GPU backend. Only valid with GPU accelerated compositing + 441// impl-side painting. 442const char kEnableGpuRasterization[] = "enable-gpu-rasterization"; 443 444// When using CPU rasterizing generate low resolution tiling. Low res 445// tiles may be displayed during fast scrolls especially on slower devices. 446const char kEnableLowResTiling[] = "enable-low-res-tiling"; 447 448// See comment for kEnableCompositingForFixedPosition. 449const char kEnableHighDpiCompositingForFixedPosition[] = 450 "enable-high-dpi-fixed-position-compositing"; 451 452#if defined(OS_WIN) 453// Disable the Legacy Window which corresponds to the size of the WebContents. 454const char kDisableLegacyIntermediateWindow[] = "disable-legacy-window"; 455 456// Enables the DirectWrite font rendering system on windows. 457const char kEnableDirectWrite[] = "enable-direct-write"; 458 459// Use high resolution timers for TimeTicks. 460const char kEnableHighResolutionTime[] = "enable-high-resolution-time"; 461#endif 462 463// Paint content on the compositor thread instead of the main thread. 464const char kEnableImplSidePainting[] = "enable-impl-side-painting"; 465 466// Enables support for inband text tracks in media content. 467const char kEnableInbandTextTracks[] = "enable-inband-text-tracks"; 468 469// Force logging to be enabled. Logging is disabled by default in release 470// builds. 471const char kEnableLogging[] = "enable-logging"; 472 473// Enable rasterizer that writes directly to GPU memory. 474const char kEnableMapImage[] = "enable-map-image"; 475 476// Enables the memory benchmarking extension 477const char kEnableMemoryBenchmarking[] = "enable-memory-benchmarking"; 478 479// On Windows, converts the page to the currently-installed monitor profile. 480// This does NOT enable color management for images. The source is still 481// assumed to be sRGB. 482const char kEnableMonitorProfile[] = "enable-monitor-profile"; 483 484// Enables use of cache if offline, even if it's stale 485const char kEnableOfflineCacheAccess[] = "enable-offline-cache-access"; 486 487// Enables use of hardware overlay for fullscreen video playback. Android only. 488const char kEnableOverlayFullscreenVideo[] = "enable-overlay-fullscreen-video"; 489 490// Disables blink subtitle and media control on top of overlay fullscreen video. 491const char kDisableOverlayFullscreenVideoSubtitle[] = 492 "disable-overlay-fullscreen-video-subtitle"; 493 494// Forward overscroll event data from the renderer to the browser. 495const char kEnableOverscrollNotifications[] = "enable-overscroll-notifications"; 496 497// Enables compositor-accelerated touch-screen pinch gestures. 498const char kEnablePinch[] = "enable-pinch"; 499 500// Enable caching of pre-parsed JS script data. See http://crbug.com/32407. 501const char kEnablePreparsedJsCaching[] = "enable-preparsed-js-caching"; 502 503// Enable privileged WebGL extensions; without this switch such extensions are 504// available only to Chrome extensions. 505const char kEnablePrivilegedWebGLExtensions[] = 506 "enable-privileged-webgl-extensions"; 507 508// Enables the CSS multicol implementation that uses the regions implementation. 509const char kEnableRegionBasedColumns[] = 510 "enable-region-based-columns"; 511 512// Enables the new layout/paint system which paints after layout is complete. 513const char kEnableRepaintAfterLayout[] = 514 "enable-repaint-after-layout"; 515 516// Enables targeted style recalculation optimizations. 517const char kEnableTargetedStyleRecalc[] = 518 "enable-targeted-style-recalc"; 519 520// Cause the OS X sandbox write to syslog every time an access to a resource 521// is denied by the sandbox. 522const char kEnableSandboxLogging[] = "enable-sandbox-logging"; 523 524// Enables the Skia benchmarking extension 525const char kEnableSkiaBenchmarking[] = "enable-skia-benchmarking"; 526 527// On platforms that support it, enables smooth scroll animation. 528const char kEnableSmoothScrolling[] = "enable-smooth-scrolling"; 529 530// Allow the compositor to use its software implementation if GL fails. 531const char kEnableSoftwareCompositing[] = "enable-software-compositing"; 532 533// Enable spatial navigation 534const char kEnableSpatialNavigation[] = "enable-spatial-navigation"; 535 536// Enables the synthesis part of the Web Speech API. 537const char kEnableSpeechSynthesis[] = "enable-speech-synthesis"; 538 539// Enables StatsTable, logging statistics to a global named shared memory table. 540const char kEnableStatsTable[] = "enable-stats-table"; 541 542// Experimentally ensures that each renderer process: 543// 1) Only handles rendering for pages from a single site, apart from iframes. 544// (Note that a page can reference content from multiple origins due to images, 545// JavaScript files, etc. Cross-site iframes are also loaded in-process.) 546// 2) Only has authority to see or use cookies for the page's top-level origin. 547// (So if a.com iframes b.com, the b.com network request will be sent without 548// cookies.) 549// This is expected to break compatibility with many pages for now. Unlike the 550// --site-per-process flag, this allows cross-site iframes, but it blocks all 551// cookies on cross-site requests. 552const char kEnableStrictSiteIsolation[] = "enable-strict-site-isolation"; 553 554// Enable support for ServiceWorker. See 555// https://github.com/slightlyoff/ServiceWorker for more information. 556const char kEnableServiceWorker[] = "enable-service-worker"; 557 558// Enable use of experimental TCP sockets API for sending data in the 559// SYN packet. 560const char kEnableTcpFastOpen[] = "enable-tcp-fastopen"; 561 562// Enable multithreaded GPU compositing of web content. 563const char kEnableThreadedCompositing[] = "enable-threaded-compositing"; 564 565// Enable accelerated overflow scrolling in all cases. 566const char kEnableUniversalAcceleratedOverflowScroll[] = 567 "enable-universal-accelerated-overflow-scroll"; 568 569// Enable screen capturing support for MediaStream API. 570const char kEnableUserMediaScreenCapturing[] = 571 "enable-usermedia-screen-capturing"; 572 573// Enables the use of the @viewport CSS rule, which allows 574// pages to control aspects of their own layout. This also turns on touch-screen 575// pinch gestures. 576const char kEnableViewport[] = "enable-viewport"; 577 578// Enables the use of the legacy viewport meta tag. Turning this on also 579// turns on the @viewport CSS rule 580const char kEnableViewportMeta[] = "enable-viewport-meta"; 581 582// Resizes of the main frame are the caused by changing between landscape 583// and portrait mode (i.e. Android) so the page should be rescaled to fit 584const char kMainFrameResizesAreOrientationChanges[] = 585 "main-frame-resizes-are-orientation-changes"; 586 587// Enables moving cursor by word in visual order. 588const char kEnableVisualWordMovement[] = "enable-visual-word-movement"; 589 590// Enable the Vtune profiler support. 591const char kEnableVtune[] = "enable-vtune-support"; 592 593// Enable SVG Animations on the Web Animations model. 594const char kEnableWebAnimationsSVG[] = "enable-web-animations-svg"; 595 596// Enables WebGL extensions not yet approved by the community. 597const char kEnableWebGLDraftExtensions[] = "enable-webgl-draft-extensions"; 598 599// Enables Web MIDI API. 600const char kEnableWebMIDI[] = "enable-web-midi"; 601 602// Load NPAPI plugins from the specified directory. 603const char kExtraPluginDir[] = "extra-plugin-dir"; 604 605// If accelerated compositing is supported, always enter compositing mode for 606// the base layer even when compositing is not strictly required. 607const char kForceCompositingMode[] = "force-compositing-mode"; 608 609// Some field trials may be randomized in the browser, and the randomly selected 610// outcome needs to be propagated to the renderer. For instance, this is used 611// to modify histograms recorded in the renderer, or to get the renderer to 612// also set of its state (initialize, or not initialize components) to match the 613// experiment(s). The option is also useful for forcing field trials when 614// testing changes locally. The argument is a list of name and value pairs, 615// separated by slashes. See FieldTrialList::CreateTrialsFromString() in 616// field_trial.h for details. 617const char kForceFieldTrials[] = "force-fieldtrials"; 618 619// Always use the Skia GPU backend for drawing layer tiles. Only valid with GPU 620// accelerated compositing + impl-side painting. Overrides the 621// kEnableGpuRasterization flag. 622const char kForceGpuRasterization[] = "force-gpu-rasterization"; 623 624// Force renderer accessibility to be on instead of enabling it on demand when 625// a screen reader is detected. The disable-renderer-accessibility switch 626// overrides this if present. 627const char kForceRendererAccessibility[] = "force-renderer-accessibility"; 628 629// Passes gpu device_id from browser process to GPU process. 630const char kGpuDeviceID[] = "gpu-device-id"; 631 632// Passes gpu driver_vendor from browser process to GPU process. 633const char kGpuDriverVendor[] = "gpu-driver-vendor"; 634 635// Passes gpu driver_version from browser process to GPU process. 636const char kGpuDriverVersion[] = "gpu-driver-version"; 637 638// Extra command line options for launching the GPU process (normally used 639// for debugging). Use like renderer-cmd-prefix. 640const char kGpuLauncher[] = "gpu-launcher"; 641 642// Makes this process a GPU sub-process. 643const char kGpuProcess[] = "gpu-process"; 644 645// Allow shmat system call in GPU sandbox. 646const char kGpuSandboxAllowSysVShm[] = "gpu-sandbox-allow-sysv-shm"; 647 648// Makes GPU sandbox failures fatal. 649const char kGpuSandboxFailuresFatal[] = "gpu-sandbox-failures-fatal"; 650 651// Allow GPU sandbox to start later 652const char kGpuSandboxStartAfterInitialization[] = 653 "gpu-sandbox-start-after-initialization"; 654 655// Causes the GPU process to display a dialog on launch. 656const char kGpuStartupDialog[] = "gpu-startup-dialog"; 657 658// Passes gpu vendor_id from browser process to GPU process. 659const char kGpuVendorID[] = "gpu-vendor-id"; 660 661// These mappings only apply to the host resolver. 662const char kHostResolverRules[] = "host-resolver-rules"; 663 664// Ignores certificate-related errors. 665const char kIgnoreCertificateErrors[] = "ignore-certificate-errors"; 666 667// Ignores GPU blacklist. 668const char kIgnoreGpuBlacklist[] = "ignore-gpu-blacklist"; 669 670// Run the GPU process as a thread in the browser process. 671const char kInProcessGPU[] = "in-process-gpu"; 672 673// Specifies the flags passed to JS engine 674const char kJavaScriptFlags[] = "js-flags"; 675 676// Load an NPAPI plugin from the specified path. 677const char kLoadPlugin[] = "load-plugin"; 678 679// Logs GPU control list decisions when enforcing blacklist rules. 680const char kLogGpuControlListDecisions[] = "log-gpu-control-list-decisions"; 681 682// Sets the minimum log level. Valid values are from 0 to 3: 683// INFO = 0, WARNING = 1, LOG_ERROR = 2, LOG_FATAL = 3. 684const char kLoggingLevel[] = "log-level"; 685 686// Enables saving net log events to a file and sets the file name to use. 687const char kLogNetLog[] = "log-net-log"; 688 689// Make plugin processes log their sent and received messages to VLOG(1). 690const char kLogPluginMessages[] = "log-plugin-messages"; 691 692// Sets the width and height above which a composited layer will get tiled. 693const char kMaxUntiledLayerHeight[] = "max-untiled-layer-height"; 694const char kMaxUntiledLayerWidth[] = "max-untiled-layer-width"; 695 696// Sample memory usage with high frequency and store the results to the 697// Renderer.Memory histogram. Used in memory tests. 698const char kMemoryMetrics[] = "memory-metrics"; 699 700// Mutes audio sent to the audio device so it is not audible during 701// automated testing. 702const char kMuteAudio[] = "mute-audio"; 703 704// Don't send HTTP-Referer headers. 705const char kNoReferrers[] = "no-referrers"; 706 707// Disables the sandbox for all process types that are normally sandboxed. 708const char kNoSandbox[] = "no-sandbox"; 709 710// Number of worker threads used to rasterize content. 711const char kNumRasterThreads[] = "num-raster-threads"; 712 713// Enables or disables history navigation in response to horizontal overscroll. 714// Set the value to '1' to enable the feature, and set to '0' to disable. 715// Defaults to enabled. 716const char kOverscrollHistoryNavigation[] = 717 "overscroll-history-navigation"; 718 719// Specifies a command that should be used to launch the plugin process. Useful 720// for running the plugin process through purify or quantify. Ex: 721// --plugin-launcher="path\to\purify /Run=yes" 722const char kPluginLauncher[] = "plugin-launcher"; 723 724// Tells the plugin process the path of the plugin to load 725const char kPluginPath[] = "plugin-path"; 726 727// Causes the process to run as a plugin subprocess. 728const char kPluginProcess[] = "plugin"; 729 730// Causes the plugin process to display a dialog on launch. 731const char kPluginStartupDialog[] = "plugin-startup-dialog"; 732 733// Argument to the process type that indicates a PPAPI broker process type. 734const char kPpapiBrokerProcess[] = "ppapi-broker"; 735 736// "Command-line" arguments for the PPAPI Flash; used for debugging options. 737const char kPpapiFlashArgs[] = "ppapi-flash-args"; 738 739// Runs PPAPI (Pepper) plugins in-process. 740const char kPpapiInProcess[] = "ppapi-in-process"; 741 742// Like kPluginLauncher for PPAPI plugins. 743const char kPpapiPluginLauncher[] = "ppapi-plugin-launcher"; 744 745// Argument to the process type that indicates a PPAPI plugin process type. 746const char kPpapiPluginProcess[] = "ppapi"; 747 748// Causes the PPAPI sub process to display a dialog on launch. Be sure to use 749// --no-sandbox as well or the sandbox won't allow the dialog to display. 750const char kPpapiStartupDialog[] = "ppapi-startup-dialog"; 751 752// Runs a single process for each site (i.e., group of pages from the same 753// registered domain) the user visits. We default to using a renderer process 754// for each site instance (i.e., group of pages from the same registered 755// domain with script connections to each other). 756const char kProcessPerSite[] = "process-per-site"; 757 758// Runs each set of script-connected tabs (i.e., a BrowsingInstance) in its own 759// renderer process. We default to using a renderer process for each 760// site instance (i.e., group of pages from the same registered domain with 761// script connections to each other). 762const char kProcessPerTab[] = "process-per-tab"; 763 764// The value of this switch determines whether the process is started as a 765// renderer or plugin host. If it's empty, it's the browser. 766const char kProcessType[] = "type"; 767 768// Enables more web features over insecure connections. Designed to be used 769// for testing purposes only. 770const char kReduceSecurityForTesting[] = "reduce-security-for-testing"; 771 772// Register Pepper plugins (see pepper_plugin_list.cc for its format). 773const char kRegisterPepperPlugins[] = "register-pepper-plugins"; 774 775// Enables remote debug over HTTP on the specified port. 776const char kRemoteDebuggingPort[] = "remote-debugging-port"; 777 778// Causes the renderer process to throw an assertion on launch. 779const char kRendererAssertTest[] = "renderer-assert-test"; 780 781// On POSIX only: the contents of this flag are prepended to the renderer 782// command line. Useful values might be "valgrind" or "xterm -e gdb --args". 783const char kRendererCmdPrefix[] = "renderer-cmd-prefix"; 784 785// Causes the process to run as renderer instead of as browser. 786const char kRendererProcess[] = "renderer"; 787 788// Overrides the default/calculated limit to the number of renderer processes. 789// Very high values for this setting can lead to high memory/resource usage 790// or instability. 791const char kRendererProcessLimit[] = "renderer-process-limit"; 792 793// Causes the renderer process to display a dialog on launch. 794const char kRendererStartupDialog[] = "renderer-startup-dialog"; 795 796// Causes the process to run as a sandbox IPC subprocess. 797const char kSandboxIPCProcess[] = "sandbox-ipc"; 798 799// Enables or disables scroll end effect in response to vertical overscroll. 800// Set the value to '1' to enable the feature, and set to '0' to disable. 801// Defaults to disabled. 802const char kScrollEndEffect[] = "scroll-end-effect"; 803 804// Visibly render a border around paint rects in the web page to help debug 805// and study painting behavior. 806const char kShowPaintRects[] = "show-paint-rects"; 807 808// Map mouse input events into touch gesture events. Useful for debugging touch 809// gestures without needing a touchscreen. 810const char kSimulateTouchScreenWithMouse[] = 811 "simulate-touch-screen-with-mouse"; 812 813// Runs the renderer and plugins in the same process as the browser 814const char kSingleProcess[] = "single-process"; 815 816// Experimentally enforces a one-site-per-process security policy. 817// All cross-site navigations force process swaps, and we can restrict a 818// renderer process's access rights based on its site. For details, see: 819// http://www.chromium.org/developers/design-documents/site-isolation 820// 821// Unlike --enable-strict-site-isolation (which allows cross-site iframes), 822// this flag does not affect which cookies are attached to cross-site requests. 823// Support is being added to render cross-site iframes in a different process 824// than their parent pages. 825const char kSitePerProcess[] = "site-per-process"; 826 827// Skip gpu info collection, blacklist loading, and blacklist auto-update 828// scheduling at browser startup time. 829// Therefore, all GPU features are available, and about:gpu page shows empty 830// content. The switch is intended only for layout tests. 831// TODO(gab): Get rid of this switch entirely. 832const char kSkipGpuDataLoading[] = "skip-gpu-data-loading"; 833 834// Specifies if the browser should start in fullscreen mode, like if the user 835// had pressed F11 right after startup. 836const char kStartFullscreen[] = "start-fullscreen"; 837 838// Specifies if the |StatsCollectionController| needs to be bound in the 839// renderer. This binding happens on per-frame basis and hence can potentially 840// be a performance bottleneck. One should only enable it when running a test 841// that needs to access the provided statistics. 842const char kStatsCollectionController[] = 843 "enable-stats-collection-bindings"; 844 845// Upscale defaults to "good". 846const char kTabCaptureDownscaleQuality[] = "tab-capture-downscale-quality"; 847 848// Scaling quality for capturing tab. Should be one of "fast", "good" or "best". 849// One flag for upscaling, one for downscaling. 850// Upscale defaults to "best". 851const char kTabCaptureUpscaleQuality[] = "tab-capture-upscale-quality"; 852 853// Allows for forcing socket connections to http/https to use fixed ports. 854const char kTestingFixedHttpPort[] = "testing-fixed-http-port"; 855const char kTestingFixedHttpsPort[] = "testing-fixed-https-port"; 856 857// Runs the security test for the renderer sandbox. 858const char kTestSandbox[] = "test-sandbox"; 859 860// Type of the current test harness ("browser" or "ui"). 861const char kTestType[] = "test-type"; 862 863// Enable timeout-based touch event cancellation if a touch ack is delayed. 864// If unspecified, touch timeout behavior will be disabled. 865const char kTouchAckTimeoutDelayMs[] = "touch-ack-timeout-delay-ms"; 866 867const char kTouchScrollingMode[] = "touch-scrolling-mode"; 868const char kTouchScrollingModeTouchcancel[] = "touchcancel"; 869const char kTouchScrollingModeSyncTouchmove[] = "sync-touchmove"; 870const char kTouchScrollingModeAbsorbTouchmove[] = "absorb-touchmove"; 871 872// Causes TRACE_EVENT flags to be recorded beginning with shutdown. Optionally, 873// can specify the specific trace categories to include (e.g. 874// --trace-shutdown=base,net) otherwise, all events are recorded. 875// --trace-shutdown-file can be used to control where the trace log gets stored 876// to since there is otherwise no way to access the result. 877const char kTraceShutdown[] = "trace-shutdown"; 878 879// If supplied, sets the file which shutdown tracing will be stored into, if 880// omitted the default will be used "chrometrace.log" in the current directory. 881// Has no effect unless --trace-shutdown is also supplied. 882// Example: --trace-shutdown --trace-shutdown-file=/tmp/trace_event.log 883const char kTraceShutdownFile[] = "trace-shutdown-file"; 884 885// Causes TRACE_EVENT flags to be recorded from startup. Optionally, can 886// specify the specific trace categories to include (e.g. 887// --trace-startup=base,net) otherwise, all events are recorded. Setting this 888// flag results in the first call to BeginTracing() to receive all trace events 889// since startup. In Chrome, you may find --trace-startup-file and 890// --trace-startup-duration to control the auto-saving of the trace (not 891// supported in the base-only TraceLog component). 892const char kTraceStartup[] = "trace-startup"; 893 894// Sets the time in seconds until startup tracing ends. If omitted a default of 895// 5 seconds is used. Has no effect without --trace-startup, or if 896// --startup-trace-file=none was supplied. 897const char kTraceStartupDuration[] = "trace-startup-duration"; 898 899// If supplied, sets the file which startup tracing will be stored into, if 900// omitted the default will be used "chrometrace.log" in the current directory. 901// Has no effect unless --trace-startup is also supplied. 902// Example: --trace-startup --trace-startup-file=/tmp/trace_event.log 903// As a special case, can be set to 'none' - this disables automatically saving 904// the result to a file and the first manually recorded trace will then receive 905// all events since startup. 906const char kTraceStartupFile[] = "trace-startup-file"; 907 908 909 910// Prioritizes the UI's command stream in the GPU process 911extern const char kUIPrioritizeInGpuProcess[] = 912 "ui-prioritize-in-gpu-process"; 913 914// Overrides the preferred discardable memory implementation. 915const char kUseDiscardableMemory[] = "use-discardable-memory"; 916 917// Use fake device for MediaStream to replace actual camera and microphone. 918const char kUseFakeDeviceForMediaStream[] = "use-fake-device-for-media-stream"; 919 920// Bypass the media stream infobar by selecting the default device for media 921// streams (e.g. WebRTC). Works with --use-fake-device-for-media-stream. 922const char kUseFakeUIForMediaStream[] = "use-fake-ui-for-media-stream"; 923 924// Set when Chromium should use a mobile user agent. 925const char kUseMobileUserAgent[] = "use-mobile-user-agent"; 926 927// On POSIX only: the contents of this flag are prepended to the utility 928// process command line. Useful values might be "valgrind" or "xterm -e gdb 929// --args". 930const char kUtilityCmdPrefix[] = "utility-cmd-prefix"; 931 932// Causes the process to run as a utility subprocess. 933const char kUtilityProcess[] = "utility"; 934 935// The utility process is sandboxed, with access to one directory. This flag 936// specifies the directory that can be accessed. 937const char kUtilityProcessAllowedDir[] = "utility-allowed-dir"; 938 939// Allows MDns to access network in sandboxed process. 940const char kUtilityProcessEnableMDns[] = "utility-enable-mdns"; 941 942const char kUtilityProcessRunningElevated[] = "utility-run-elevated"; 943 944// In debug builds, asserts that the stream of input events is valid. 945const char kValidateInputEventStream[] = "validate-input-event-stream"; 946 947// Will add kWaitForDebugger to every child processes. If a value is passed, it 948// will be used as a filter to determine if the child process should have the 949// kWaitForDebugger flag passed on or not. 950const char kWaitForDebuggerChildren[] = "wait-for-debugger-children"; 951 952// Overrides the amount of shared memory the webgl command buffer allocates 953const char kWebGLCommandBufferSizeKb[] = "webgl-command-buffer-size-kb"; 954 955// Causes the process to run as a worker subprocess. 956const char kWorkerProcess[] = "worker"; 957 958// The prefix used when starting the zygote process. (i.e. 'gdb --args') 959const char kZygoteCmdPrefix[] = "zygote-cmd-prefix"; 960 961// Causes the process to run as a renderer zygote. 962const char kZygoteProcess[] = "zygote"; 963 964#if defined(ENABLE_WEBRTC) 965// Enables audio processing in a MediaStreamTrack. When this flag is on, AEC, 966// NS and AGC will be done per MediaStreamTrack instead of in PeerConnection. 967const char kEnableAudioTrackProcessing[] = "enable-audio-track-processing"; 968 969// Disables WebRTC device enumeration. 970const char kDisableDeviceEnumeration[] = "disable-device-enumeration"; 971 972// Disables HW decode acceleration for WebRTC. 973const char kDisableWebRtcHWDecoding[] = "disable-webrtc-hw-decoding"; 974 975// Disables encryption of RTP Media for WebRTC. When Chrome embeds Content, it 976// ignores this switch on its stable and beta channels. 977const char kDisableWebRtcEncryption[] = "disable-webrtc-encryption"; 978 979// Disables HW encode acceleration for WebRTC. 980const char kDisableWebRtcHWEncoding[] = "disable-webrtc-hw-encoding"; 981 982// Enables WebRTC to open TCP server sockets. 983const char kEnableWebRtcTcpServerSocket[] = "enable-webrtc-tcp-server-socket"; 984 985// Enables VP8 HW encode acceleration for WebRTC. 986const char kEnableWebRtcHWVp8Encoding[] = "enable-webrtc-hw-vp8-encoding"; 987#endif 988 989#if defined(OS_ANDROID) 990// Disable user gesture requirement for the media element to enter fullscreen. 991const char kDisableGestureRequirementForMediaFullscreen[] = 992 "disable-gesture-requirement-for-media-fullscreen"; 993 994// Disable user gesture requirement for media playback. 995const char kDisableGestureRequirementForMediaPlayback[] = 996 "disable-gesture-requirement-for-media-playback"; 997 998// Disable history logging for media elements. 999const char kDisableMediaHistoryLogging[] = "disable-media-history"; 1000 1001// Disable the click delay by sending click events during double tap. 1002const char kDisableClickDelay[] = "disable-click-delay"; 1003 1004// Disable overscroll edge effects like those found in Android views. 1005const char kDisableOverscrollEdgeEffect[] = "disable-overscroll-edge-effect"; 1006 1007// WebRTC is enabled by default on Android. 1008const char kDisableWebRTC[] = "disable-webrtc"; 1009 1010// Enable the recognition part of the Web Speech API. 1011const char kEnableSpeechRecognition[] = "enable-speech-recognition"; 1012 1013// The telephony region (ISO country code) to use in phone number detection. 1014const char kNetworkCountryIso[] = "network-country-iso"; 1015 1016// Enables remote debug over HTTP on the specified socket name. 1017const char kRemoteDebuggingSocketName[] = "remote-debugging-socket-name"; 1018#endif 1019 1020// Disable web audio API. 1021const char kDisableWebAudio[] = "disable-webaudio"; 1022 1023#if defined(OS_CHROMEOS) 1024// Disables panel fitting (used for mirror mode). 1025const char kDisablePanelFitting[] = "disable-panel-fitting"; 1026#endif 1027 1028#if defined(OS_MACOSX) && !defined(OS_IOS) 1029const char kEnableCarbonInterposing[] = "enable-carbon-interposing"; 1030 1031// Disables support for Core Animation plugins. This is triggered when 1032// accelerated compositing is disabled. See http://crbug.com/122430 . 1033const char kDisableCoreAnimationPlugins[] = 1034 "disable-core-animation-plugins"; 1035#endif 1036 1037// Don't dump stuff here, follow the same order as the header. 1038 1039} // namespace switches 1040