content_switches.cc revision 0529e5d033099cbfc42635f6f6183833b09dff6e
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// Choose which logging channels in blink platform to activate. See 42// Logging.cpp in blink's Source/platform for a list of available channels. 43const char kBlinkPlatformLogChannels[] = "blink-platform-log-channels"; 44 45// Block cross-site documents (i.e., HTML/XML/JSON) from being loaded in 46// subresources when a document is not supposed to read them. This will later 47// allow us to block them from the entire renderer process when site isolation 48// is enabled. 49const char kBlockCrossSiteDocuments[] = "block-cross-site-documents"; 50 51// Causes the browser process to throw an assertion on startup. 52const char kBrowserAssertTest[] = "assert-test"; 53 54// Causes the browser process to crash on startup. 55const char kBrowserCrashTest[] = "crash-test"; 56 57// Path to the exe to run for the renderer and plugin subprocesses. 58const char kBrowserSubprocessPath[] = "browser-subprocess-path"; 59 60// Dumps extra logging about plugin loading to the log file. 61const char kDebugPluginLoading[] = "debug-plugin-loading"; 62 63// Sets the tile size used by composited layers. 64const char kDefaultTileWidth[] = "default-tile-width"; 65const char kDefaultTileHeight[] = "default-tile-height"; 66 67// Disable antialiasing on 2d canvas. 68const char kDisable2dCanvasAntialiasing[] = "disable-canvas-aa"; 69 70// Disables client-visible 3D APIs, in particular WebGL and Pepper 3D. 71// This is controlled by policy and is kept separate from the other 72// enable/disable switches to avoid accidentally regressing the policy 73// support for controlling access to these APIs. 74const char kDisable3DAPIs[] = "disable-3d-apis"; 75 76// Disable gpu-accelerated 2d canvas. 77const char kDisableAccelerated2dCanvas[] = "disable-accelerated-2d-canvas"; 78 79// Disables accelerated compositing for backgrounds of root layers with 80// background-attachment: fixed. 81const char kDisableAcceleratedFixedRootBackground[] = 82 "disable-accelerated-fixed-root-background"; 83 84// Disables the hardware acceleration of 3D CSS and animation. 85const char kDisableAcceleratedLayers[] = "disable-accelerated-layers"; 86 87// Disables accelerated compositing for overflow scroll. 88const char kDisableAcceleratedOverflowScroll[] = 89 "disable-accelerated-overflow-scroll"; 90 91// Disables layer squashing. 92const char kDisableLayerSquashing[] = 93 "disable-layer-squashing"; 94 95// Disables GPU accelerated video display. 96const char kDisableAcceleratedVideo[] = "disable-accelerated-video"; 97 98// Disables hardware acceleration of video decode, where available. 99const char kDisableAcceleratedVideoDecode[] = 100 "disable-accelerated-video-decode"; 101 102// Disables the alternate window station for the renderer. 103const char kDisableAltWinstation[] = "disable-winsta"; 104 105// Disable the ApplicationCache. 106const char kDisableApplicationCache[] = "disable-application-cache"; 107 108// Disable limits on the number of backing stores. Can prevent blinking for 109// users with many windows/tabs and lots of memory. 110const char kDisableBackingStoreLimit[] = "disable-backing-store-limit"; 111 112// See comment for kEnableCompositingForFixedPosition. 113const char kDisableCompositingForFixedPosition[] = 114 "disable-fixed-position-compositing"; 115 116// See comment for kEnableCompositingForTransition. 117const char kDisableCompositingForTransition[] = 118 "disable-transition-compositing"; 119 120// Disables HTML5 DB support. 121const char kDisableDatabases[] = "disable-databases"; 122 123// Disables delegated renderer. 124const char kDisableDelegatedRenderer[] = "disable-delegated-renderer"; 125 126// Disables desktop notifications (default enabled on windows). 127const char kDisableDesktopNotifications[] = "disable-desktop-notifications"; 128 129// Disables experimental navigator content utils implementation. 130const char kDisableNavigatorContentUtils[] = 131 "disable-navigator-content-utils"; 132 133// Handles URL requests by NPAPI plugins through the renderer. 134const char kDisableDirectNPAPIRequests[] = "disable-direct-npapi-requests"; 135 136// Disable the per-domain blocking for 3D APIs after GPU reset. 137// This switch is intended only for tests. 138extern const char kDisableDomainBlockingFor3DAPIs[] = 139 "disable-domain-blocking-for-3d-apis"; 140 141// Disable running the SharedWorker inside the renderer process. 142const char kDisableEmbeddedSharedWorker[] = "disable-embedded-shared-worker"; 143 144// Disable experimental WebGL support. 145const char kDisableExperimentalWebGL[] = "disable-webgl"; 146 147// Disable the fast text autosizing implementation. 148const char kDisableFastTextAutosizing[] = "disable-fast-text-autosizing"; 149 150// Disable FileSystem API. 151const char kDisableFileSystem[] = "disable-file-system"; 152 153// Disables sending filters (SkImageFilter objects) between processes over IPC 154const char kDisableFiltersOverIPC[] = "disable-filters-over-ipc"; 155 156const char kDisableFixedPositionCreatesStackingContext[] 157 = "disable-fixed-position-creates-stacking-context"; 158 159// Disable 3D inside of flapper. 160const char kDisableFlash3d[] = "disable-flash-3d"; 161 162// Disable Stage3D inside of flapper. 163const char kDisableFlashStage3d[] = "disable-flash-stage3d"; 164 165// Disable deferral of scroll-ending gesture events when a scroll is active. 166const char kDisableGestureDebounce[] = "disable-gesture-debounce"; 167 168const char kDisableGestureTapHighlight[] = "disable-gesture-tap-highlight"; 169 170// Disable GL multisampling. 171const char kDisableGLMultisampling[] = "disable-gl-multisampling"; 172 173// Disables GPU hardware acceleration. If software renderer is not in place, 174// then the GPU process won't launch. 175const char kDisableGpu[] = "disable-gpu"; 176 177// Prevent the compositor from using its GPU implementation. 178const char kDisableGpuCompositing[] = "disable-gpu-compositing"; 179 180// Disable the limit on the number of times the GPU process may be restarted 181// This switch is intended only for tests. 182extern const char kDisableGpuProcessCrashLimit[] = 183 "disable-gpu-process-crash-limit"; 184 185// Disable GPU rasterization, i.e. rasterize on the CPU only. 186// Overrides the kEnableGpuRasterization and kForceGpuRasterization flags. 187const char kDisableGpuRasterization[] = "disable-gpu-rasterization"; 188 189// When using CPU rasterizing disable low resolution tiling. This uses 190// less power, particularly during animations, but more white may be seen 191// during fast scrolling especially on slower devices. 192const char kDisableLowResTiling[] = "disable-low-res-tiling"; 193 194// Disable the GPU process sandbox. 195const char kDisableGpuSandbox[] = "disable-gpu-sandbox"; 196 197// Disable the thread that crashes the GPU process if it stops responding to 198// messages. 199const char kDisableGpuWatchdog[] = "disable-gpu-watchdog"; 200 201// Suppresses hang monitor dialogs in renderer processes. This may allow slow 202// unload handlers on a page to prevent the tab from closing, but the Task 203// Manager can be used to terminate the offending process in this case. 204const char kDisableHangMonitor[] = "disable-hang-monitor"; 205 206// Disable the RenderThread's HistogramCustomizer. 207const char kDisableHistogramCustomizer[] = "disable-histogram-customizer"; 208 209// Paint content on the main thread instead of the compositor thread. 210// Overrides the kEnableImplSidePainting flag. 211const char kDisableImplSidePainting[] = "disable-impl-side-painting"; 212 213// Prevent Java from running. 214const char kDisableJava[] = "disable-java"; 215 216// Don't execute JavaScript (browser JS like the new tab page still runs). 217const char kDisableJavaScript[] = "disable-javascript"; 218 219// Don't kill a child process when it sends a bad IPC message. Apart 220// from testing, it is a bad idea from a security perspective to enable 221// this switch. 222const char kDisableKillAfterBadIPC[] = "disable-kill-after-bad-ipc"; 223 224// Disables prefixed Encrypted Media API (e.g. webkitGenerateKeyRequest()). 225const char kDisablePrefixedEncryptedMedia[] = 226 "disable-prefixed-encrypted-media"; 227 228// Disables LCD text. 229const char kDisableLCDText[] = "disable-lcd-text"; 230 231// Disable LocalStorage. 232const char kDisableLocalStorage[] = "disable-local-storage"; 233 234// Force logging to be disabled. Logging is enabled by default in debug 235// builds. 236const char kDisableLogging[] = "disable-logging"; 237 238// Disable rasterizer that writes directly to GPU memory. 239// Overrides the kEnableMapImage flag. 240const char kDisableMapImage[] = "disable-map-image"; 241 242// Disables Media Source API (i.e., the MediaSource object). 243const char kDisableMediaSource[] = "disable-media-source"; 244 245// Disable Pepper3D. 246const char kDisablePepper3d[] = "disable-pepper-3d"; 247 248// Disables compositor-accelerated touch-screen pinch gestures. 249const char kDisablePinch[] = "disable-pinch"; 250 251// Prevent plugins from running. 252const char kDisablePlugins[] = "disable-plugins"; 253 254// Disable discovering third-party plug-ins. Effectively loading only 255// ones shipped with the browser plus third-party ones as specified by 256// --extra-plugin-dir and --load-plugin switches. 257const char kDisablePluginsDiscovery[] = "disable-plugins-discovery"; 258 259// Disables remote web font support. SVG font should always work whether this 260// option is specified or not. 261const char kDisableRemoteFonts[] = "disable-remote-fonts"; 262 263// Turns off the accessibility in the renderer. 264const char kDisableRendererAccessibility[] = "disable-renderer-accessibility"; 265 266// Disables the new layout/paint system which paints after layout is complete. 267const char kDisableRepaintAfterLayout[] = "disable-repaint-after-layout"; 268 269// Disable the seccomp filter sandbox (seccomp-bpf) (Linux only). 270const char kDisableSeccompFilterSandbox[] = "disable-seccomp-filter-sandbox"; 271 272// Disable session storage. 273const char kDisableSessionStorage[] = "disable-session-storage"; 274 275// Disable the setuid sandbox (Linux only). 276const char kDisableSetuidSandbox[] = "disable-setuid-sandbox"; 277 278// Enable shared workers. Functionality not yet complete. 279const char kDisableSharedWorkers[] = "disable-shared-workers"; 280 281// Disables site-specific tailoring to compatibility issues in WebKit. 282const char kDisableSiteSpecificQuirks[] = "disable-site-specific-quirks"; 283 284// Disable smooth scrolling for testing. 285const char kDisableSmoothScrolling[] = "disable-smooth-scrolling"; 286 287// Disables the use of a 3D software rasterizer. 288const char kDisableSoftwareRasterizer[] = "disable-software-rasterizer"; 289 290// Disables speech input. 291const char kDisableSpeechInput[] = "disable-speech-input"; 292 293// Disable False Start in SSL and TLS connections. 294const char kDisableSSLFalseStart[] = "disable-ssl-false-start"; 295 296// Disable multithreaded GPU compositing of web content. 297const char kDisableThreadedCompositing[] = "disable-threaded-compositing"; 298 299// Disables the threaded HTML parser in Blink 300const char kDisableThreadedHTMLParser[] = "disable-threaded-html-parser"; 301 302// Disable accelerated overflow scrolling in corner cases (that would not be 303// handled by enable-accelerated-overflow-scroll). 304const char kDisableUniversalAcceleratedOverflowScroll[] = 305 "disable-universal-accelerated-overflow-scroll"; 306 307// Don't enforce the same-origin policy. (Used by people testing their sites.) 308const char kDisableWebSecurity[] = "disable-web-security"; 309 310// Disables support for XSLT. 311const char kDisableXSLT[] = "disable-xslt"; 312 313// Disables Blink's XSSAuditor. The XSSAuditor mitigates reflective XSS. 314const char kDisableXSSAuditor[] = "disable-xss-auditor"; 315 316// Specifies if the |DOMAutomationController| needs to be bound in the 317// renderer. This binding happens on per-frame basis and hence can potentially 318// be a performance bottleneck. One should only enable it when automating dom 319// based tests. 320const char kDomAutomationController[] = "dom-automation"; 321 322// Enable bleeding-edge code to make Chrome draw content faster. The changes 323// behind this path are very likely to break lots of content. 324// ** DO NOT use this flag unless you know what you are doing. ** 325const char kEnableBleedingEdgeRenderingFastPaths[] = 326 "enable-bleeding-edge-rendering-fast-paths"; 327 328// Disable gpu-accelerated 2d canvas. 329const char kEnableDeferredFilters[] = "enable-deferred-filters"; 330 331// Enables accelerated compositing for backgrounds of root layers with 332// background-attachment: fixed. 333const char kEnableAcceleratedFixedRootBackground[] = 334 "enable-accelerated-fixed-root-background"; 335 336// Enables accelerated compositing for overflow scroll. Promotes eligible 337// overflow:scroll elements to layers to enable accelerated scrolling for them. 338const char kEnableAcceleratedOverflowScroll[] = 339 "enable-accelerated-overflow-scroll"; 340 341// Enables LCD text. 342const char kEnableLCDText[] = "enable-lcd-text"; 343 344// Enables experimental feature that maps multiple RenderLayers to 345// one composited layer to avoid pathological layer counts. 346const char kEnableLayerSquashing[] = 347 "enable-layer-squashing"; 348 349// Enable experimental container node culling. 350const char kEnableContainerCulling[] = "enable-container-culling"; 351 352// Turns on extremely verbose logging of accessibility events. 353const char kEnableAccessibilityLogging[] = "enable-accessibility-logging"; 354 355// Use a BeginFrame signal from browser to renderer to schedule rendering. 356const char kEnableBeginFrameScheduling[] = "enable-begin-frame-scheduling"; 357 358// Enables browser plugin for all types of pages. 359const char kEnableBrowserPluginForAllViewTypes[] = 360 "enable-browser-plugin-for-all-view-types"; 361 362// Enable the creation of compositing layers for fixed position 363// elements. Three options are needed to support four possible scenarios: 364// 1. Default (disabled) 365// 2. Enabled always (to allow dogfooding) 366// 3. Disabled always (to give safety fallback for users) 367// 4. Enabled only if we detect a highDPI display 368// 369// Option #4 may soon be the default, because the feature is needed soon for 370// high DPI, but cannot be used (yet) for low DPI. Options #2 and #3 will 371// override Option #4. 372const char kEnableCompositingForFixedPosition[] = 373 "enable-fixed-position-compositing"; 374 375// Enable/Disable the creation of compositing layers for RenderLayers with a 376// transition on a property that supports accelerated animation (that is, 377// opacity, -webkit-transform, and -webkit-filter), even when no animation is 378// running. These options allow for three possible scenarios: 379// 1. Default (enabled only if we dectect a highDPI display) 380// 2. Enabled always. 381// 3. Disabled always. 382const char kEnableCompositingForTransition[] = 383 "enable-transition-compositing"; 384 385// Defer image decoding in WebKit until painting. 386const char kEnableDeferredImageDecoding[] = "enable-deferred-image-decoding"; 387 388// Enables delegated renderer. 389const char kEnableDelegatedRenderer[] = "enable-delegated-renderer"; 390 391// Enables restarting interrupted downloads. 392const char kEnableDownloadResumption[] = "enable-download-resumption"; 393 394// Enables support for Encrypted Media Extensions (e.g. MediaKeys). 395const char kEnableEncryptedMedia[] = "enable-encrypted-media"; 396 397// Enable experimental canvas features, e.g. canvas 2D context attributes 398const char kEnableExperimentalCanvasFeatures[] = 399 "enable-experimental-canvas-features"; 400 401// Enables Web Platform features that are in development. 402const char kEnableExperimentalWebPlatformFeatures[] = 403 "enable-experimental-web-platform-features"; 404 405// By default, cookies are not allowed on file://. They are needed for testing, 406// for example page cycler and layout tests. See bug 1157243. 407const char kEnableFileCookies[] = "enable-file-cookies"; 408 409// Enable the fast text autosizing implementation. 410const char kEnableFastTextAutosizing[] = "enable-fast-text-autosizing"; 411 412const char kEnableFixedPositionCreatesStackingContext[] 413 = "enable-fixed-position-creates-stacking-context"; 414 415// Enable Gesture Tap Highlight 416const char kEnableGestureTapHighlight[] = "enable-gesture-tap-highlight"; 417 418// Enables TRACE for GL calls in the renderer. 419const char kEnableGpuClientTracing[] = "enable-gpu-client-tracing"; 420 421// Allow heuristics to determine when a layer tile should be drawn with the 422// Skia GPU backend. Only valid with GPU accelerated compositing + 423// impl-side painting. 424const char kEnableGpuRasterization[] = "enable-gpu-rasterization"; 425 426// When using CPU rasterizing generate low resolution tiling. Low res 427// tiles may be displayed during fast scrolls especially on slower devices. 428const char kEnableLowResTiling[] = "enable-low-res-tiling"; 429 430// See comment for kEnableCompositingForFixedPosition. 431const char kEnableHighDpiCompositingForFixedPosition[] = 432 "enable-high-dpi-fixed-position-compositing"; 433 434#if defined(OS_WIN) 435// Disable the Legacy Window which corresponds to the size of the WebContents. 436const char kDisableLegacyIntermediateWindow[] = "disable-legacy-window"; 437 438// Enables the DirectWrite font rendering system on windows. 439const char kEnableDirectWrite[] = "enable-direct-write"; 440 441// Use high resolution timers for TimeTicks. 442const char kEnableHighResolutionTime[] = "enable-high-resolution-time"; 443#endif 444 445// Paint content on the compositor thread instead of the main thread. 446const char kEnableImplSidePainting[] = "enable-impl-side-painting"; 447 448// Enables support for inband text tracks in media content. 449const char kEnableInbandTextTracks[] = "enable-inband-text-tracks"; 450 451// Force logging to be enabled. Logging is disabled by default in release 452// builds. 453const char kEnableLogging[] = "enable-logging"; 454 455// Enable rasterizer that writes directly to GPU memory. 456const char kEnableMapImage[] = "enable-map-image"; 457 458// Enables the memory benchmarking extension 459const char kEnableMemoryBenchmarking[] = "enable-memory-benchmarking"; 460 461// Make the values returned to window.performance.memory more granular and more 462// up to date in shared worker. Without this flag, the memory information is 463// still available, but it is bucketized and updated less frequently. 464const char kEnableSharedWorkerMemoryInfo[] = 465 "enable-shared-worker-memory-info"; 466 467// On Windows, converts the page to the currently-installed monitor profile. 468// This does NOT enable color management for images. The source is still 469// assumed to be sRGB. 470const char kEnableMonitorProfile[] = "enable-monitor-profile"; 471 472// Enables use of cache if offline, even if it's stale 473const char kEnableOfflineCacheAccess[] = "enable-offline-cache-access"; 474 475// Enables use of hardware overlay for fullscreen video playback. Android only. 476const char kEnableOverlayFullscreenVideo[] = "enable-overlay-fullscreen-video"; 477 478// Disables blink subtitle and media control on top of overlay fullscreen video. 479const char kDisableOverlayFullscreenVideoSubtitle[] = 480 "disable-overlay-fullscreen-video-subtitle"; 481 482// Forward overscroll event data from the renderer to the browser. 483const char kEnableOverscrollNotifications[] = "enable-overscroll-notifications"; 484 485// Enables compositor-accelerated touch-screen pinch gestures. 486const char kEnablePinch[] = "enable-pinch"; 487 488// Enable caching of pre-parsed JS script data. See http://crbug.com/32407. 489const char kEnablePreparsedJsCaching[] = "enable-preparsed-js-caching"; 490 491// Enable privileged WebGL extensions; without this switch such extensions are 492// available only to Chrome extensions. 493const char kEnablePrivilegedWebGLExtensions[] = 494 "enable-privileged-webgl-extensions"; 495 496// Enables the CSS multicol implementation that uses the regions implementation. 497const char kEnableRegionBasedColumns[] = 498 "enable-region-based-columns"; 499 500// Enables the new layout/paint system which paints after layout is complete. 501const char kEnableRepaintAfterLayout[] = 502 "enable-repaint-after-layout"; 503 504// Enables targeted style recalculation optimizations. 505const char kEnableTargetedStyleRecalc[] = 506 "enable-targeted-style-recalc"; 507 508// Cause the OS X sandbox write to syslog every time an access to a resource 509// is denied by the sandbox. 510const char kEnableSandboxLogging[] = "enable-sandbox-logging"; 511 512// Enables seccomp-bpf support for Android. Requires experimental kernel 513// support. <http://crbug.com/166704> 514const char kEnableSeccompFilterSandbox[] = 515 "enable-seccomp-filter-sandbox"; 516 517// Enables the Skia benchmarking extension 518const char kEnableSkiaBenchmarking[] = "enable-skia-benchmarking"; 519 520// On platforms that support it, enables smooth scroll animation. 521const char kEnableSmoothScrolling[] = "enable-smooth-scrolling"; 522 523// Enable spatial navigation 524const char kEnableSpatialNavigation[] = "enable-spatial-navigation"; 525 526// Enables the synthesis part of the Web Speech API. 527const char kEnableSpeechSynthesis[] = "enable-speech-synthesis"; 528 529// Enables StatsTable, logging statistics to a global named shared memory table. 530const char kEnableStatsTable[] = "enable-stats-table"; 531 532// Experimentally ensures that each renderer process: 533// 1) Only handles rendering for pages from a single site, apart from iframes. 534// (Note that a page can reference content from multiple origins due to images, 535// JavaScript files, etc. Cross-site iframes are also loaded in-process.) 536// 2) Only has authority to see or use cookies for the page's top-level origin. 537// (So if a.com iframes b.com, the b.com network request will be sent without 538// cookies.) 539// This is expected to break compatibility with many pages for now. Unlike the 540// --site-per-process flag, this allows cross-site iframes, but it blocks all 541// cookies on cross-site requests. 542const char kEnableStrictSiteIsolation[] = "enable-strict-site-isolation"; 543 544// Enable support for ServiceWorker. See 545// https://github.com/slightlyoff/ServiceWorker for more information. 546const char kEnableServiceWorker[] = "enable-service-worker"; 547 548// Enable support for sync events in ServiceWorkers. 549const char kEnableServiceWorkerSync[] = "enable-service-worker-sync"; 550 551// Enable use of experimental TCP sockets API for sending data in the 552// SYN packet. 553const char kEnableTcpFastOpen[] = "enable-tcp-fastopen"; 554 555// Enable multithreaded GPU compositing of web content. 556const char kEnableThreadedCompositing[] = "enable-threaded-compositing"; 557 558// Enable accelerated overflow scrolling in all cases. 559const char kEnableUniversalAcceleratedOverflowScroll[] = 560 "enable-universal-accelerated-overflow-scroll"; 561 562// Enable screen capturing support for MediaStream API. 563const char kEnableUserMediaScreenCapturing[] = 564 "enable-usermedia-screen-capturing"; 565 566// Enables the use of the @viewport CSS rule, which allows 567// pages to control aspects of their own layout. This also turns on touch-screen 568// pinch gestures. 569const char kEnableViewport[] = "enable-viewport"; 570 571// Enables the use of the legacy viewport meta tag. Turning this on also 572// turns on the @viewport CSS rule 573const char kEnableViewportMeta[] = "enable-viewport-meta"; 574 575// Resizes of the main frame are the caused by changing between landscape 576// and portrait mode (i.e. Android) so the page should be rescaled to fit 577const char kMainFrameResizesAreOrientationChanges[] = 578 "main-frame-resizes-are-orientation-changes"; 579 580// Enable the Vtune profiler support. 581const char kEnableVtune[] = "enable-vtune-support"; 582 583// Enable SVG Animations on the Web Animations model. 584const char kEnableWebAnimationsSVG[] = "enable-web-animations-svg"; 585 586// Enables WebGL extensions not yet approved by the community. 587const char kEnableWebGLDraftExtensions[] = "enable-webgl-draft-extensions"; 588 589// Enables Web MIDI API. 590const char kEnableWebMIDI[] = "enable-web-midi"; 591 592// Load NPAPI plugins from the specified directory. 593const char kExtraPluginDir[] = "extra-plugin-dir"; 594 595// Enable force_compositing_mode in layout tests. 596const char kForceCompositingMode[] = "force-compositing-mode"; 597 598// Some field trials may be randomized in the browser, and the randomly selected 599// outcome needs to be propagated to the renderer. For instance, this is used 600// to modify histograms recorded in the renderer, or to get the renderer to 601// also set of its state (initialize, or not initialize components) to match the 602// experiment(s). The option is also useful for forcing field trials when 603// testing changes locally. The argument is a list of name and value pairs, 604// separated by slashes. See FieldTrialList::CreateTrialsFromString() in 605// field_trial.h for details. 606const char kForceFieldTrials[] = "force-fieldtrials"; 607 608// Always use the Skia GPU backend for drawing layer tiles. Only valid with GPU 609// accelerated compositing + impl-side painting. Overrides the 610// kEnableGpuRasterization flag. 611const char kForceGpuRasterization[] = "force-gpu-rasterization"; 612 613// Force renderer accessibility to be on instead of enabling it on demand when 614// a screen reader is detected. The disable-renderer-accessibility switch 615// overrides this if present. 616const char kForceRendererAccessibility[] = "force-renderer-accessibility"; 617 618// Passes gpu device_id from browser process to GPU process. 619const char kGpuDeviceID[] = "gpu-device-id"; 620 621// Passes gpu driver_vendor from browser process to GPU process. 622const char kGpuDriverVendor[] = "gpu-driver-vendor"; 623 624// Passes gpu driver_version from browser process to GPU process. 625const char kGpuDriverVersion[] = "gpu-driver-version"; 626 627// Extra command line options for launching the GPU process (normally used 628// for debugging). Use like renderer-cmd-prefix. 629const char kGpuLauncher[] = "gpu-launcher"; 630 631// Makes this process a GPU sub-process. 632const char kGpuProcess[] = "gpu-process"; 633 634// Allow shmat system call in GPU sandbox. 635const char kGpuSandboxAllowSysVShm[] = "gpu-sandbox-allow-sysv-shm"; 636 637// Makes GPU sandbox failures fatal. 638const char kGpuSandboxFailuresFatal[] = "gpu-sandbox-failures-fatal"; 639 640// Allow GPU sandbox to start later 641const char kGpuSandboxStartAfterInitialization[] = 642 "gpu-sandbox-start-after-initialization"; 643 644// Causes the GPU process to display a dialog on launch. 645const char kGpuStartupDialog[] = "gpu-startup-dialog"; 646 647// Passes gpu vendor_id from browser process to GPU process. 648const char kGpuVendorID[] = "gpu-vendor-id"; 649 650// These mappings only apply to the host resolver. 651const char kHostResolverRules[] = "host-resolver-rules"; 652 653// Ignores certificate-related errors. 654const char kIgnoreCertificateErrors[] = "ignore-certificate-errors"; 655 656// Ignores GPU blacklist. 657const char kIgnoreGpuBlacklist[] = "ignore-gpu-blacklist"; 658 659// Run the GPU process as a thread in the browser process. 660const char kInProcessGPU[] = "in-process-gpu"; 661 662// Specifies the flags passed to JS engine 663const char kJavaScriptFlags[] = "js-flags"; 664 665// Load an NPAPI plugin from the specified path. 666const char kLoadPlugin[] = "load-plugin"; 667 668// Logs GPU control list decisions when enforcing blacklist rules. 669const char kLogGpuControlListDecisions[] = "log-gpu-control-list-decisions"; 670 671// Sets the minimum log level. Valid values are from 0 to 3: 672// INFO = 0, WARNING = 1, LOG_ERROR = 2, LOG_FATAL = 3. 673const char kLoggingLevel[] = "log-level"; 674 675// Enables saving net log events to a file and sets the file name to use. 676const char kLogNetLog[] = "log-net-log"; 677 678// Make plugin processes log their sent and received messages to VLOG(1). 679const char kLogPluginMessages[] = "log-plugin-messages"; 680 681// Sets the width and height above which a composited layer will get tiled. 682const char kMaxUntiledLayerHeight[] = "max-untiled-layer-height"; 683const char kMaxUntiledLayerWidth[] = "max-untiled-layer-width"; 684 685// Sample memory usage with high frequency and store the results to the 686// Renderer.Memory histogram. Used in memory tests. 687const char kMemoryMetrics[] = "memory-metrics"; 688 689// Mutes audio sent to the audio device so it is not audible during 690// automated testing. 691const char kMuteAudio[] = "mute-audio"; 692 693// Don't send HTTP-Referer headers. 694const char kNoReferrers[] = "no-referrers"; 695 696// Disables the sandbox for all process types that are normally sandboxed. 697const char kNoSandbox[] = "no-sandbox"; 698 699// Number of worker threads used to rasterize content. 700const char kNumRasterThreads[] = "num-raster-threads"; 701 702// Enables or disables history navigation in response to horizontal overscroll. 703// Set the value to '1' to enable the feature, and set to '0' to disable. 704// Defaults to enabled. 705const char kOverscrollHistoryNavigation[] = 706 "overscroll-history-navigation"; 707 708// Specifies a command that should be used to launch the plugin process. Useful 709// for running the plugin process through purify or quantify. Ex: 710// --plugin-launcher="path\to\purify /Run=yes" 711const char kPluginLauncher[] = "plugin-launcher"; 712 713// Tells the plugin process the path of the plugin to load 714const char kPluginPath[] = "plugin-path"; 715 716// Causes the process to run as a plugin subprocess. 717const char kPluginProcess[] = "plugin"; 718 719// Causes the plugin process to display a dialog on launch. 720const char kPluginStartupDialog[] = "plugin-startup-dialog"; 721 722// Argument to the process type that indicates a PPAPI broker process type. 723const char kPpapiBrokerProcess[] = "ppapi-broker"; 724 725// "Command-line" arguments for the PPAPI Flash; used for debugging options. 726const char kPpapiFlashArgs[] = "ppapi-flash-args"; 727 728// Runs PPAPI (Pepper) plugins in-process. 729const char kPpapiInProcess[] = "ppapi-in-process"; 730 731// Like kPluginLauncher for PPAPI plugins. 732const char kPpapiPluginLauncher[] = "ppapi-plugin-launcher"; 733 734// Argument to the process type that indicates a PPAPI plugin process type. 735const char kPpapiPluginProcess[] = "ppapi"; 736 737// Causes the PPAPI sub process to display a dialog on launch. Be sure to use 738// --no-sandbox as well or the sandbox won't allow the dialog to display. 739const char kPpapiStartupDialog[] = "ppapi-startup-dialog"; 740 741// Runs a single process for each site (i.e., group of pages from the same 742// registered domain) the user visits. We default to using a renderer process 743// for each site instance (i.e., group of pages from the same registered 744// domain with script connections to each other). 745const char kProcessPerSite[] = "process-per-site"; 746 747// Runs each set of script-connected tabs (i.e., a BrowsingInstance) in its own 748// renderer process. We default to using a renderer process for each 749// site instance (i.e., group of pages from the same registered domain with 750// script connections to each other). 751const char kProcessPerTab[] = "process-per-tab"; 752 753// The value of this switch determines whether the process is started as a 754// renderer or plugin host. If it's empty, it's the browser. 755const char kProcessType[] = "type"; 756 757// Enables more web features over insecure connections. Designed to be used 758// for testing purposes only. 759const char kReduceSecurityForTesting[] = "reduce-security-for-testing"; 760 761// Register Pepper plugins (see pepper_plugin_list.cc for its format). 762const char kRegisterPepperPlugins[] = "register-pepper-plugins"; 763 764// Enables remote debug over HTTP on the specified port. 765const char kRemoteDebuggingPort[] = "remote-debugging-port"; 766 767// Causes the renderer process to throw an assertion on launch. 768const char kRendererAssertTest[] = "renderer-assert-test"; 769 770// On POSIX only: the contents of this flag are prepended to the renderer 771// command line. Useful values might be "valgrind" or "xterm -e gdb --args". 772const char kRendererCmdPrefix[] = "renderer-cmd-prefix"; 773 774// Causes the process to run as renderer instead of as browser. 775const char kRendererProcess[] = "renderer"; 776 777// Overrides the default/calculated limit to the number of renderer processes. 778// Very high values for this setting can lead to high memory/resource usage 779// or instability. 780const char kRendererProcessLimit[] = "renderer-process-limit"; 781 782// Causes the renderer process to display a dialog on launch. 783const char kRendererStartupDialog[] = "renderer-startup-dialog"; 784 785// Causes the process to run as a sandbox IPC subprocess. 786const char kSandboxIPCProcess[] = "sandbox-ipc"; 787 788// Enables or disables scroll end effect in response to vertical overscroll. 789// Set the value to '1' to enable the feature, and set to '0' to disable. 790// Defaults to disabled. 791const char kScrollEndEffect[] = "scroll-end-effect"; 792 793// Visibly render a border around paint rects in the web page to help debug 794// and study painting behavior. 795const char kShowPaintRects[] = "show-paint-rects"; 796 797// Map mouse input events into touch gesture events. Useful for debugging touch 798// gestures without needing a touchscreen. 799const char kSimulateTouchScreenWithMouse[] = 800 "simulate-touch-screen-with-mouse"; 801 802// Runs the renderer and plugins in the same process as the browser 803const char kSingleProcess[] = "single-process"; 804 805// Experimentally enforces a one-site-per-process security policy. 806// All cross-site navigations force process swaps, and we can restrict a 807// renderer process's access rights based on its site. For details, see: 808// http://www.chromium.org/developers/design-documents/site-isolation 809// 810// Unlike --enable-strict-site-isolation (which allows cross-site iframes), 811// this flag does not affect which cookies are attached to cross-site requests. 812// Support is being added to render cross-site iframes in a different process 813// than their parent pages. 814const char kSitePerProcess[] = "site-per-process"; 815 816// Skip gpu info collection, blacklist loading, and blacklist auto-update 817// scheduling at browser startup time. 818// Therefore, all GPU features are available, and about:gpu page shows empty 819// content. The switch is intended only for layout tests. 820// TODO(gab): Get rid of this switch entirely. 821const char kSkipGpuDataLoading[] = "skip-gpu-data-loading"; 822 823// Specifies if the browser should start in fullscreen mode, like if the user 824// had pressed F11 right after startup. 825const char kStartFullscreen[] = "start-fullscreen"; 826 827// Specifies if the |StatsCollectionController| needs to be bound in the 828// renderer. This binding happens on per-frame basis and hence can potentially 829// be a performance bottleneck. One should only enable it when running a test 830// that needs to access the provided statistics. 831const char kStatsCollectionController[] = 832 "enable-stats-collection-bindings"; 833 834// Upscale defaults to "good". 835const char kTabCaptureDownscaleQuality[] = "tab-capture-downscale-quality"; 836 837// Scaling quality for capturing tab. Should be one of "fast", "good" or "best". 838// One flag for upscaling, one for downscaling. 839// Upscale defaults to "best". 840const char kTabCaptureUpscaleQuality[] = "tab-capture-upscale-quality"; 841 842// Allows for forcing socket connections to http/https to use fixed ports. 843const char kTestingFixedHttpPort[] = "testing-fixed-http-port"; 844const char kTestingFixedHttpsPort[] = "testing-fixed-https-port"; 845 846// Runs the security test for the renderer sandbox. 847const char kTestSandbox[] = "test-sandbox"; 848 849// Type of the current test harness ("browser" or "ui"). 850const char kTestType[] = "test-type"; 851 852// Enable timeout-based touch event cancellation if a touch ack is delayed. 853// If unspecified, touch timeout behavior will be disabled. 854const char kTouchAckTimeoutDelayMs[] = "touch-ack-timeout-delay-ms"; 855 856const char kTouchScrollingMode[] = "touch-scrolling-mode"; 857const char kTouchScrollingModeTouchcancel[] = "touchcancel"; 858const char kTouchScrollingModeSyncTouchmove[] = "sync-touchmove"; 859const char kTouchScrollingModeAbsorbTouchmove[] = "absorb-touchmove"; 860 861// Causes TRACE_EVENT flags to be recorded beginning with shutdown. Optionally, 862// can specify the specific trace categories to include (e.g. 863// --trace-shutdown=base,net) otherwise, all events are recorded. 864// --trace-shutdown-file can be used to control where the trace log gets stored 865// to since there is otherwise no way to access the result. 866const char kTraceShutdown[] = "trace-shutdown"; 867 868// If supplied, sets the file which shutdown tracing will be stored into, if 869// omitted the default will be used "chrometrace.log" in the current directory. 870// Has no effect unless --trace-shutdown is also supplied. 871// Example: --trace-shutdown --trace-shutdown-file=/tmp/trace_event.log 872const char kTraceShutdownFile[] = "trace-shutdown-file"; 873 874// Causes TRACE_EVENT flags to be recorded from startup. Optionally, can 875// specify the specific trace categories to include (e.g. 876// --trace-startup=base,net) otherwise, all events are recorded. Setting this 877// flag results in the first call to BeginTracing() to receive all trace events 878// since startup. In Chrome, you may find --trace-startup-file and 879// --trace-startup-duration to control the auto-saving of the trace (not 880// supported in the base-only TraceLog component). 881const char kTraceStartup[] = "trace-startup"; 882 883// Sets the time in seconds until startup tracing ends. If omitted a default of 884// 5 seconds is used. Has no effect without --trace-startup, or if 885// --startup-trace-file=none was supplied. 886const char kTraceStartupDuration[] = "trace-startup-duration"; 887 888// If supplied, sets the file which startup tracing will be stored into, if 889// omitted the default will be used "chrometrace.log" in the current directory. 890// Has no effect unless --trace-startup is also supplied. 891// Example: --trace-startup --trace-startup-file=/tmp/trace_event.log 892// As a special case, can be set to 'none' - this disables automatically saving 893// the result to a file and the first manually recorded trace will then receive 894// all events since startup. 895const char kTraceStartupFile[] = "trace-startup-file"; 896 897 898 899// Prioritizes the UI's command stream in the GPU process 900extern const char kUIPrioritizeInGpuProcess[] = 901 "ui-prioritize-in-gpu-process"; 902 903// Overrides the preferred discardable memory implementation. 904const char kUseDiscardableMemory[] = "use-discardable-memory"; 905 906// Use fake device for MediaStream to replace actual camera and microphone. 907const char kUseFakeDeviceForMediaStream[] = "use-fake-device-for-media-stream"; 908 909// Bypass the media stream infobar by selecting the default device for media 910// streams (e.g. WebRTC). Works with --use-fake-device-for-media-stream. 911const char kUseFakeUIForMediaStream[] = "use-fake-ui-for-media-stream"; 912 913// Set when Chromium should use a mobile user agent. 914const char kUseMobileUserAgent[] = "use-mobile-user-agent"; 915 916// On POSIX only: the contents of this flag are prepended to the utility 917// process command line. Useful values might be "valgrind" or "xterm -e gdb 918// --args". 919const char kUtilityCmdPrefix[] = "utility-cmd-prefix"; 920 921// Causes the process to run as a utility subprocess. 922const char kUtilityProcess[] = "utility"; 923 924// The utility process is sandboxed, with access to one directory. This flag 925// specifies the directory that can be accessed. 926const char kUtilityProcessAllowedDir[] = "utility-allowed-dir"; 927 928// Allows MDns to access network in sandboxed process. 929const char kUtilityProcessEnableMDns[] = "utility-enable-mdns"; 930 931const char kUtilityProcessRunningElevated[] = "utility-run-elevated"; 932 933// In debug builds, asserts that the stream of input events is valid. 934const char kValidateInputEventStream[] = "validate-input-event-stream"; 935 936// Will add kWaitForDebugger to every child processes. If a value is passed, it 937// will be used as a filter to determine if the child process should have the 938// kWaitForDebugger flag passed on or not. 939const char kWaitForDebuggerChildren[] = "wait-for-debugger-children"; 940 941// Overrides the amount of shared memory the webgl command buffer allocates 942const char kWebGLCommandBufferSizeKb[] = "webgl-command-buffer-size-kb"; 943 944// Causes the process to run as a worker subprocess. 945const char kWorkerProcess[] = "worker"; 946 947// The prefix used when starting the zygote process. (i.e. 'gdb --args') 948const char kZygoteCmdPrefix[] = "zygote-cmd-prefix"; 949 950// Causes the process to run as a renderer zygote. 951const char kZygoteProcess[] = "zygote"; 952 953#if defined(ENABLE_WEBRTC) 954// Enables audio processing in a MediaStreamTrack. When this flag is on, AEC, 955// NS and AGC will be done per MediaStreamTrack instead of in PeerConnection. 956const char kEnableAudioTrackProcessing[] = "enable-audio-track-processing"; 957 958// Disables WebRTC device enumeration. 959const char kDisableDeviceEnumeration[] = "disable-device-enumeration"; 960 961// Disables HW decode acceleration for WebRTC. 962const char kDisableWebRtcHWDecoding[] = "disable-webrtc-hw-decoding"; 963 964// Disables encryption of RTP Media for WebRTC. When Chrome embeds Content, it 965// ignores this switch on its stable and beta channels. 966const char kDisableWebRtcEncryption[] = "disable-webrtc-encryption"; 967 968// Disables HW encode acceleration for WebRTC. 969const char kDisableWebRtcHWEncoding[] = "disable-webrtc-hw-encoding"; 970 971// Enables WebRTC to open TCP server sockets. 972const char kEnableWebRtcTcpServerSocket[] = "enable-webrtc-tcp-server-socket"; 973 974// Enables VP8 HW encode acceleration for WebRTC. 975const char kEnableWebRtcHWVp8Encoding[] = "enable-webrtc-hw-vp8-encoding"; 976#endif 977 978#if defined(OS_ANDROID) 979// Disable user gesture requirement for the media element to enter fullscreen. 980const char kDisableGestureRequirementForMediaFullscreen[] = 981 "disable-gesture-requirement-for-media-fullscreen"; 982 983// Disable user gesture requirement for media playback. 984const char kDisableGestureRequirementForMediaPlayback[] = 985 "disable-gesture-requirement-for-media-playback"; 986 987// Disable history logging for media elements. 988const char kDisableMediaHistoryLogging[] = "disable-media-history"; 989 990// Disable the click delay by sending click events during double tap. 991const char kDisableClickDelay[] = "disable-click-delay"; 992 993// Disable overscroll edge effects like those found in Android views. 994const char kDisableOverscrollEdgeEffect[] = "disable-overscroll-edge-effect"; 995 996// WebRTC is enabled by default on Android. 997const char kDisableWebRTC[] = "disable-webrtc"; 998 999// Enable the recognition part of the Web Speech API. 1000const char kEnableSpeechRecognition[] = "enable-speech-recognition"; 1001 1002// Always use the video overlay for the embedded video. 1003// This switch is intended only for tests. 1004const char kForceUseOverlayEmbeddedVideo[] = "force-use-overlay-embedded-video"; 1005 1006// The telephony region (ISO country code) to use in phone number detection. 1007const char kNetworkCountryIso[] = "network-country-iso"; 1008 1009// Enables remote debug over HTTP on the specified socket name. 1010const char kRemoteDebuggingSocketName[] = "remote-debugging-socket-name"; 1011#endif 1012 1013// Disable web audio API. 1014const char kDisableWebAudio[] = "disable-webaudio"; 1015 1016#if defined(OS_CHROMEOS) 1017// Disables panel fitting (used for mirror mode). 1018const char kDisablePanelFitting[] = "disable-panel-fitting"; 1019#endif 1020 1021#if defined(OS_MACOSX) && !defined(OS_IOS) 1022const char kEnableCarbonInterposing[] = "enable-carbon-interposing"; 1023 1024// Disables support for Core Animation plugins. This is triggered when 1025// accelerated compositing is disabled. See http://crbug.com/122430 . 1026const char kDisableCoreAnimationPlugins[] = 1027 "disable-core-animation-plugins"; 1028#endif 1029 1030// Don't dump stuff here, follow the same order as the header. 1031 1032} // namespace switches 1033