content_switches.cc revision 6d86b77056ed63eb6871182f42a9fd5f07550f90
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 frames with an https origin to use WebSockets with an insecure URL 20// (ws://). 21const char kAllowInsecureWebSocketFromHttpsOrigin[] = 22 "allow-insecure-websocket-from-https-origin"; 23 24// Allows loopback interface to be added in network list for peer connection. 25const char kAllowLoopbackInPeerConnection[] = 26 "allow-loopback-in-peer-connection"; 27 28// Enables the sandboxed processes to run without a job object assigned to them. 29// This flag is required to allow Chrome to run in RemoteApps or Citrix. This 30// flag can reduce the security of the sandboxed processes and allow them to do 31// certain API calls like shut down Windows or access the clipboard. Also we 32// lose the chance to kill some processes until the outer job that owns them 33// finishes. 34const char kAllowNoSandboxJob[] = "allow-no-sandbox-job"; 35 36// Allows debugging of sandboxed processes (see zygote_main_linux.cc). 37const char kAllowSandboxDebugging[] = "allow-sandbox-debugging"; 38 39// The same as kAuditHandles except all handles are enumerated. 40const char kAuditAllHandles[] = "enable-handle-auditing-all"; 41 42// Enumerates and prints a child process' most dangerous handles when it 43// is terminated. 44const char kAuditHandles[] = "enable-handle-auditing"; 45 46// Choose which logging channels in blink platform to activate. See 47// Logging.cpp in blink's Source/platform for a list of available channels. 48const char kBlinkPlatformLogChannels[] = "blink-platform-log-channels"; 49 50// Block cross-site documents (i.e., HTML/XML/JSON) from being loaded in 51// subresources when a document is not supposed to read them. This will later 52// allow us to block them from the entire renderer process when site isolation 53// is enabled. 54const char kBlockCrossSiteDocuments[] = "block-cross-site-documents"; 55 56// Causes the browser process to throw an assertion on startup. 57const char kBrowserAssertTest[] = "assert-test"; 58 59// Causes the browser process to crash on startup. 60const char kBrowserCrashTest[] = "crash-test"; 61 62// Path to the exe to run for the renderer and plugin subprocesses. 63const char kBrowserSubprocessPath[] = "browser-subprocess-path"; 64 65// Dumps extra logging about plugin loading to the log file. 66const char kDebugPluginLoading[] = "debug-plugin-loading"; 67 68// Sets the tile size used by composited layers. 69const char kDefaultTileWidth[] = "default-tile-width"; 70const char kDefaultTileHeight[] = "default-tile-height"; 71 72// Disable antialiasing on 2d canvas. 73const char kDisable2dCanvasAntialiasing[] = "disable-canvas-aa"; 74 75// Disables client-visible 3D APIs, in particular WebGL and Pepper 3D. 76// This is controlled by policy and is kept separate from the other 77// enable/disable switches to avoid accidentally regressing the policy 78// support for controlling access to these APIs. 79const char kDisable3DAPIs[] = "disable-3d-apis"; 80 81// Disable gpu-accelerated 2d canvas. 82const char kDisableAccelerated2dCanvas[] = "disable-accelerated-2d-canvas"; 83 84// Disables accelerated compositing for backgrounds of root layers with 85// background-attachment: fixed. 86const char kDisableAcceleratedFixedRootBackground[] = 87 "disable-accelerated-fixed-root-background"; 88 89// Disables accelerated compositing for overflow scroll. 90const char kDisableAcceleratedOverflowScroll[] = 91 "disable-accelerated-overflow-scroll"; 92 93// Disables layer squashing. 94const char kDisableLayerSquashing[] = 95 "disable-layer-squashing"; 96 97// Disables hardware acceleration of video decode, where available. 98const char kDisableAcceleratedVideoDecode[] = 99 "disable-accelerated-video-decode"; 100 101// Disable the ApplicationCache. 102const char kDisableApplicationCache[] = "disable-application-cache"; 103 104// Disable limits on the number of backing stores. Can prevent blinking for 105// users with many windows/tabs and lots of memory. 106const char kDisableBackingStoreLimit[] = "disable-backing-store-limit"; 107 108// See comment for kEnableCompositingForFixedPosition. 109const char kDisableCompositingForFixedPosition[] = 110 "disable-fixed-position-compositing"; 111 112// See comment for kEnableCompositingForTransition. 113const char kDisableCompositingForTransition[] = 114 "disable-transition-compositing"; 115 116// Disables HTML5 DB support. 117const char kDisableDatabases[] = "disable-databases"; 118 119// Disables delegated renderer. 120const char kDisableDelegatedRenderer[] = "disable-delegated-renderer"; 121 122// Disables desktop notifications (default enabled on windows). 123const char kDisableDesktopNotifications[] = "disable-desktop-notifications"; 124 125// Disables experimental navigator content utils implementation. 126const char kDisableNavigatorContentUtils[] = 127 "disable-navigator-content-utils"; 128 129// Handles URL requests by NPAPI plugins through the renderer. 130const char kDisableDirectNPAPIRequests[] = "disable-direct-npapi-requests"; 131 132// Disable the per-domain blocking for 3D APIs after GPU reset. 133// This switch is intended only for tests. 134extern const char kDisableDomainBlockingFor3DAPIs[] = 135 "disable-domain-blocking-for-3d-apis"; 136 137// Disable running the SharedWorker inside the renderer process. 138const char kDisableEmbeddedSharedWorker[] = "disable-embedded-shared-worker"; 139 140// Disable experimental WebGL support. 141const char kDisableExperimentalWebGL[] = "disable-webgl"; 142 143// Disable the fast text autosizing implementation. 144const char kDisableFastTextAutosizing[] = "disable-fast-text-autosizing"; 145 146// Disable FileSystem API. 147const char kDisableFileSystem[] = "disable-file-system"; 148 149// Disable 3D inside of flapper. 150const char kDisableFlash3d[] = "disable-flash-3d"; 151 152// Disable Stage3D inside of flapper. 153const char kDisableFlashStage3d[] = "disable-flash-stage3d"; 154 155const char kDisableGestureTapHighlight[] = "disable-gesture-tap-highlight"; 156 157// Disables GPU hardware acceleration. If software renderer is not in place, 158// then the GPU process won't launch. 159const char kDisableGpu[] = "disable-gpu"; 160 161// Prevent the compositor from using its GPU implementation. 162const char kDisableGpuCompositing[] = "disable-gpu-compositing"; 163 164// Disable the limit on the number of times the GPU process may be restarted 165// This switch is intended only for tests. 166extern const char kDisableGpuProcessCrashLimit[] = 167 "disable-gpu-process-crash-limit"; 168 169// Disable GPU rasterization, i.e. rasterize on the CPU only. 170// Overrides the kEnableGpuRasterization and kForceGpuRasterization flags. 171const char kDisableGpuRasterization[] = "disable-gpu-rasterization"; 172 173// When using CPU rasterizing disable low resolution tiling. This uses 174// less power, particularly during animations, but more white may be seen 175// during fast scrolling especially on slower devices. 176const char kDisableLowResTiling[] = "disable-low-res-tiling"; 177 178// Disable the GPU process sandbox. 179const char kDisableGpuSandbox[] = "disable-gpu-sandbox"; 180 181// Disable the thread that crashes the GPU process if it stops responding to 182// messages. 183const char kDisableGpuWatchdog[] = "disable-gpu-watchdog"; 184 185// Suppresses hang monitor dialogs in renderer processes. This may allow slow 186// unload handlers on a page to prevent the tab from closing, but the Task 187// Manager can be used to terminate the offending process in this case. 188const char kDisableHangMonitor[] = "disable-hang-monitor"; 189 190// Disable the RenderThread's HistogramCustomizer. 191const char kDisableHistogramCustomizer[] = "disable-histogram-customizer"; 192 193// Paint content on the main thread instead of the compositor thread. 194// Overrides the kEnableImplSidePainting flag. 195const char kDisableImplSidePainting[] = "disable-impl-side-painting"; 196 197// Prevent Java from running. 198const char kDisableJava[] = "disable-java"; 199 200// Don't execute JavaScript (browser JS like the new tab page still runs). 201const char kDisableJavaScript[] = "disable-javascript"; 202 203// Don't kill a child process when it sends a bad IPC message. Apart 204// from testing, it is a bad idea from a security perspective to enable 205// this switch. 206const char kDisableKillAfterBadIPC[] = "disable-kill-after-bad-ipc"; 207 208// Disables prefixed Encrypted Media API (e.g. webkitGenerateKeyRequest()). 209const char kDisablePrefixedEncryptedMedia[] = 210 "disable-prefixed-encrypted-media"; 211 212// Disables LCD text. 213const char kDisableLCDText[] = "disable-lcd-text"; 214 215// Disables distance field text. 216const char kDisableDistanceFieldText[] = "disable-distance-field-text"; 217 218// Disable LocalStorage. 219const char kDisableLocalStorage[] = "disable-local-storage"; 220 221// Force logging to be disabled. Logging is enabled by default in debug 222// builds. 223const char kDisableLogging[] = "disable-logging"; 224 225// Disables Media Source API (i.e., the MediaSource object). 226const char kDisableMediaSource[] = "disable-media-source"; 227 228// Disable Pepper3D. 229const char kDisablePepper3d[] = "disable-pepper-3d"; 230 231// Disables compositor-accelerated touch-screen pinch gestures. 232const char kDisablePinch[] = "disable-pinch"; 233 234// Prevent plugins from running. 235const char kDisablePlugins[] = "disable-plugins"; 236 237// Disable discovering third-party plug-ins. Effectively loading only 238// ones shipped with the browser plus third-party ones as specified by 239// --extra-plugin-dir and --load-plugin switches. 240const char kDisablePluginsDiscovery[] = "disable-plugins-discovery"; 241 242// Disables remote web font support. SVG font should always work whether this 243// option is specified or not. 244const char kDisableRemoteFonts[] = "disable-remote-fonts"; 245 246// Turns off the accessibility in the renderer. 247const char kDisableRendererAccessibility[] = "disable-renderer-accessibility"; 248 249// Disables the new layout/paint system which paints after layout is complete. 250const char kDisableRepaintAfterLayout[] = "disable-repaint-after-layout"; 251 252// Disable the seccomp filter sandbox (seccomp-bpf) (Linux only). 253const char kDisableSeccompFilterSandbox[] = "disable-seccomp-filter-sandbox"; 254 255// Disable session storage. 256const char kDisableSessionStorage[] = "disable-session-storage"; 257 258// Disable the setuid sandbox (Linux only). 259const char kDisableSetuidSandbox[] = "disable-setuid-sandbox"; 260 261// Enable shared workers. Functionality not yet complete. 262const char kDisableSharedWorkers[] = "disable-shared-workers"; 263 264// Disables site-specific tailoring to compatibility issues in WebKit. 265const char kDisableSiteSpecificQuirks[] = "disable-site-specific-quirks"; 266 267// Disable smooth scrolling for testing. 268const char kDisableSmoothScrolling[] = "disable-smooth-scrolling"; 269 270// Disables the use of a 3D software rasterizer. 271const char kDisableSoftwareRasterizer[] = "disable-software-rasterizer"; 272 273// Disable False Start in SSL and TLS connections. 274const char kDisableSSLFalseStart[] = "disable-ssl-false-start"; 275 276// Disable multithreaded GPU compositing of web content. 277const char kDisableThreadedCompositing[] = "disable-threaded-compositing"; 278 279// Don't enforce the same-origin policy. (Used by people testing their sites.) 280const char kDisableWebSecurity[] = "disable-web-security"; 281 282// Disables support for XSLT. 283const char kDisableXSLT[] = "disable-xslt"; 284 285// Disables Blink's XSSAuditor. The XSSAuditor mitigates reflective XSS. 286const char kDisableXSSAuditor[] = "disable-xss-auditor"; 287 288// Disable rasterizer that writes directly to GPU memory associated with tiles. 289// Overrides the kEnableZeroCopy flag. 290const char kDisableZeroCopy[] = "disable-zero-copy"; 291 292// Specifies if the |DOMAutomationController| needs to be bound in the 293// renderer. This binding happens on per-frame basis and hence can potentially 294// be a performance bottleneck. One should only enable it when automating dom 295// based tests. 296const char kDomAutomationController[] = "dom-automation"; 297 298// Enable bleeding-edge code to make Chrome draw content faster. The changes 299// behind this path are very likely to break lots of content. 300// ** DO NOT use this flag unless you know what you are doing. ** 301const char kEnableBleedingEdgeRenderingFastPaths[] = 302 "enable-bleeding-edge-rendering-fast-paths"; 303 304// Disable deferred image filters. 305const char kDisableDeferredFilters[] = "disable-deferred-filters"; 306 307// Enables accelerated compositing for backgrounds of root layers with 308// background-attachment: fixed. 309const char kEnableAcceleratedFixedRootBackground[] = 310 "enable-accelerated-fixed-root-background"; 311 312// Enables accelerated compositing for overflow scroll. Promotes eligible 313// overflow:scroll elements to layers to enable accelerated scrolling for them. 314const char kEnableAcceleratedOverflowScroll[] = 315 "enable-accelerated-overflow-scroll"; 316 317// Enables LCD text. 318const char kEnableLCDText[] = "enable-lcd-text"; 319 320// Enables using signed distance fields when rendering text. 321// Only valid if GPU rasterization is enabled as well. 322const char kEnableDistanceFieldText[] = "enable-distance-field-text"; 323 324// Enables experimental feature that maps multiple RenderLayers to 325// one composited layer to avoid pathological layer counts. 326const char kEnableLayerSquashing[] = 327 "enable-layer-squashing"; 328 329// Enable experimental container node culling. 330const char kEnableContainerCulling[] = "enable-container-culling"; 331 332// Use a BeginFrame signal from browser to renderer to schedule rendering. 333const char kEnableBeginFrameScheduling[] = "enable-begin-frame-scheduling"; 334 335// Enable the creation of compositing layers for fixed position 336// elements. Three options are needed to support four possible scenarios: 337// 1. Default (disabled) 338// 2. Enabled always (to allow dogfooding) 339// 3. Disabled always (to give safety fallback for users) 340// 4. Enabled only if we detect a highDPI display 341// 342// Option #4 may soon be the default, because the feature is needed soon for 343// high DPI, but cannot be used (yet) for low DPI. Options #2 and #3 will 344// override Option #4. 345const char kEnableCompositingForFixedPosition[] = 346 "enable-fixed-position-compositing"; 347 348// Enable/Disable the creation of compositing layers for RenderLayers with a 349// transition on a property that supports accelerated animation (that is, 350// opacity, -webkit-transform, and -webkit-filter), even when no animation is 351// running. These options allow for three possible scenarios: 352// 1. Default (enabled only if we dectect a highDPI display) 353// 2. Enabled always. 354// 3. Disabled always. 355const char kEnableCompositingForTransition[] = 356 "enable-transition-compositing"; 357 358// Defer image decoding in WebKit until painting. 359const char kEnableDeferredImageDecoding[] = "enable-deferred-image-decoding"; 360 361// Enables delegated renderer. 362const char kEnableDelegatedRenderer[] = "enable-delegated-renderer"; 363 364// Enables restarting interrupted downloads. 365const char kEnableDownloadResumption[] = "enable-download-resumption"; 366 367// Enables support for Encrypted Media Extensions (e.g. MediaKeys). 368const char kEnableEncryptedMedia[] = "enable-encrypted-media"; 369 370// Enable experimental canvas features, e.g. canvas 2D context attributes 371const char kEnableExperimentalCanvasFeatures[] = 372 "enable-experimental-canvas-features"; 373 374// Enables Web Platform features that are in development. 375const char kEnableExperimentalWebPlatformFeatures[] = 376 "enable-experimental-web-platform-features"; 377 378// By default, cookies are not allowed on file://. They are needed for testing, 379// for example page cycler and layout tests. See bug 1157243. 380const char kEnableFileCookies[] = "enable-file-cookies"; 381 382// Enable the fast text autosizing implementation. 383const char kEnableFastTextAutosizing[] = "enable-fast-text-autosizing"; 384 385// Enable Gesture Tap Highlight 386const char kEnableGestureTapHighlight[] = "enable-gesture-tap-highlight"; 387 388// Enables TRACE for GL calls in the renderer. 389const char kEnableGpuClientTracing[] = "enable-gpu-client-tracing"; 390 391// Allow heuristics to determine when a layer tile should be drawn with the 392// Skia GPU backend. Only valid with GPU accelerated compositing + 393// impl-side painting. 394const char kEnableGpuRasterization[] = "enable-gpu-rasterization"; 395 396// When using CPU rasterizing generate low resolution tiling. Low res 397// tiles may be displayed during fast scrolls especially on slower devices. 398const char kEnableLowResTiling[] = "enable-low-res-tiling"; 399 400// See comment for kEnableCompositingForFixedPosition. 401const char kEnableHighDpiCompositingForFixedPosition[] = 402 "enable-high-dpi-fixed-position-compositing"; 403 404// Paint content on the compositor thread instead of the main thread. 405const char kEnableImplSidePainting[] = "enable-impl-side-painting"; 406 407// Enables support for inband text tracks in media content. 408const char kEnableInbandTextTracks[] = "enable-inband-text-tracks"; 409 410// Force logging to be enabled. Logging is disabled by default in release 411// builds. 412const char kEnableLogging[] = "enable-logging"; 413 414// Enables the memory benchmarking extension 415const char kEnableMemoryBenchmarking[] = "enable-memory-benchmarking"; 416 417// Enable rasterizer that writes directly to GPU memory. 418const char kEnableOneCopy[] = "enable-one-copy"; 419 420// Enables use of hardware overlay for fullscreen video playback. Android only. 421const char kEnableOverlayFullscreenVideo[] = "enable-overlay-fullscreen-video"; 422 423// Disables blink subtitle and media control on top of overlay fullscreen video. 424const char kDisableOverlayFullscreenVideoSubtitle[] = 425 "disable-overlay-fullscreen-video-subtitle"; 426 427// Forward overscroll event data from the renderer to the browser. 428const char kEnableOverscrollNotifications[] = "enable-overscroll-notifications"; 429 430// Enables compositor-accelerated touch-screen pinch gestures. 431const char kEnablePinch[] = "enable-pinch"; 432 433// Make the values returned to window.performance.memory more granular and more 434// up to date in shared worker. Without this flag, the memory information is 435// still available, but it is bucketized and updated less frequently. This flag 436// also applys to workers. 437const char kEnablePreciseMemoryInfo[] = "enable-precise-memory-info"; 438 439// Enable caching of pre-parsed JS script data. See http://crbug.com/32407. 440const char kEnablePreparsedJsCaching[] = "enable-preparsed-js-caching"; 441 442// Enables the CSS multicol implementation that uses the regions implementation. 443const char kEnableRegionBasedColumns[] = 444 "enable-region-based-columns"; 445 446// Enables the new layout/paint system which paints after layout is complete. 447const char kEnableRepaintAfterLayout[] = 448 "enable-repaint-after-layout"; 449 450// Enables targeted style recalculation optimizations. 451const char kEnableTargetedStyleRecalc[] = 452 "enable-targeted-style-recalc"; 453 454// Cause the OS X sandbox write to syslog every time an access to a resource 455// is denied by the sandbox. 456const char kEnableSandboxLogging[] = "enable-sandbox-logging"; 457 458// Enables seccomp-bpf support for Android. Requires experimental kernel 459// support. <http://crbug.com/166704> 460const char kEnableSeccompFilterSandbox[] = 461 "enable-seccomp-filter-sandbox"; 462 463// Enables the Skia benchmarking extension 464const char kEnableSkiaBenchmarking[] = "enable-skia-benchmarking"; 465 466// On platforms that support it, enables smooth scroll animation. 467const char kEnableSmoothScrolling[] = "enable-smooth-scrolling"; 468 469// Enable spatial navigation 470const char kEnableSpatialNavigation[] = "enable-spatial-navigation"; 471 472// Enables the synthesis part of the Web Speech API. 473const char kEnableSpeechSynthesis[] = "enable-speech-synthesis"; 474 475// Enables StatsTable, logging statistics to a global named shared memory table. 476const char kEnableStatsTable[] = "enable-stats-table"; 477 478// Experimentally ensures that each renderer process: 479// 1) Only handles rendering for pages from a single site, apart from iframes. 480// (Note that a page can reference content from multiple origins due to images, 481// JavaScript files, etc. Cross-site iframes are also loaded in-process.) 482// 2) Only has authority to see or use cookies for the page's top-level origin. 483// (So if a.com iframes b.com, the b.com network request will be sent without 484// cookies.) 485// This is expected to break compatibility with many pages for now. Unlike the 486// --site-per-process flag, this allows cross-site iframes, but it blocks all 487// cookies on cross-site requests. 488const char kEnableStrictSiteIsolation[] = "enable-strict-site-isolation"; 489 490// Enable support for ServiceWorker. See 491// https://github.com/slightlyoff/ServiceWorker for more information. 492const char kEnableServiceWorker[] = "enable-service-worker"; 493 494// Enable support for sync events in ServiceWorkers. 495const char kEnableServiceWorkerSync[] = "enable-service-worker-sync"; 496 497// Enable use of experimental TCP sockets API for sending data in the 498// SYN packet. 499const char kEnableTcpFastOpen[] = "enable-tcp-fastopen"; 500 501// Enable multithreaded GPU compositing of web content. 502const char kEnableThreadedCompositing[] = "enable-threaded-compositing"; 503 504// Enable screen capturing support for MediaStream API. 505const char kEnableUserMediaScreenCapturing[] = 506 "enable-usermedia-screen-capturing"; 507 508// Enables the use of the @viewport CSS rule, which allows 509// pages to control aspects of their own layout. This also turns on touch-screen 510// pinch gestures. 511const char kEnableViewport[] = "enable-viewport"; 512 513// Enables the use of the legacy viewport meta tag. Turning this on also 514// turns on the @viewport CSS rule 515const char kEnableViewportMeta[] = "enable-viewport-meta"; 516 517// Resizes of the main frame are the caused by changing between landscape 518// and portrait mode (i.e. Android) so the page should be rescaled to fit 519const char kMainFrameResizesAreOrientationChanges[] = 520 "main-frame-resizes-are-orientation-changes"; 521 522// Enable the Vtune profiler support. 523const char kEnableVtune[] = "enable-vtune-support"; 524 525// Enable SVG Animations on the Web Animations model. 526const char kEnableWebAnimationsSVG[] = "enable-web-animations-svg"; 527 528// Enables WebGL extensions not yet approved by the community. 529const char kEnableWebGLDraftExtensions[] = "enable-webgl-draft-extensions"; 530 531// Enables WebGL rendering into a scanout buffer for overlay support. 532const char kEnableWebGLImageChromium[] = "enable-webgl-image-chromium"; 533 534// Enables Web MIDI API. 535const char kEnableWebMIDI[] = "enable-web-midi"; 536 537// Enable rasterizer that writes directly to GPU memory associated with tiles. 538const char kEnableZeroCopy[] = "enable-zero-copy"; 539 540// Load NPAPI plugins from the specified directory. 541const char kExtraPluginDir[] = "extra-plugin-dir"; 542 543// Some field trials may be randomized in the browser, and the randomly selected 544// outcome needs to be propagated to the renderer. For instance, this is used 545// to modify histograms recorded in the renderer, or to get the renderer to 546// also set of its state (initialize, or not initialize components) to match the 547// experiment(s). The option is also useful for forcing field trials when 548// testing changes locally. The argument is a list of name and value pairs, 549// separated by slashes. See FieldTrialList::CreateTrialsFromString() in 550// field_trial.h for details. 551const char kForceFieldTrials[] = "force-fieldtrials"; 552 553// Always use the Skia GPU backend for drawing layer tiles. Only valid with GPU 554// accelerated compositing + impl-side painting. Overrides the 555// kEnableGpuRasterization flag. 556const char kForceGpuRasterization[] = "force-gpu-rasterization"; 557 558// Force renderer accessibility to be on instead of enabling it on demand when 559// a screen reader is detected. The disable-renderer-accessibility switch 560// overrides this if present. 561const char kForceRendererAccessibility[] = "force-renderer-accessibility"; 562 563// Passes gpu device_id from browser process to GPU process. 564const char kGpuDeviceID[] = "gpu-device-id"; 565 566// Passes gpu driver_vendor from browser process to GPU process. 567const char kGpuDriverVendor[] = "gpu-driver-vendor"; 568 569// Passes gpu driver_version from browser process to GPU process. 570const char kGpuDriverVersion[] = "gpu-driver-version"; 571 572// Extra command line options for launching the GPU process (normally used 573// for debugging). Use like renderer-cmd-prefix. 574const char kGpuLauncher[] = "gpu-launcher"; 575 576// Makes this process a GPU sub-process. 577const char kGpuProcess[] = "gpu-process"; 578 579// Allow shmat system call in GPU sandbox. 580const char kGpuSandboxAllowSysVShm[] = "gpu-sandbox-allow-sysv-shm"; 581 582// Makes GPU sandbox failures fatal. 583const char kGpuSandboxFailuresFatal[] = "gpu-sandbox-failures-fatal"; 584 585// Allow GPU sandbox to start later 586const char kGpuSandboxStartAfterInitialization[] = 587 "gpu-sandbox-start-after-initialization"; 588 589// Causes the GPU process to display a dialog on launch. 590const char kGpuStartupDialog[] = "gpu-startup-dialog"; 591 592// Passes gpu vendor_id from browser process to GPU process. 593const char kGpuVendorID[] = "gpu-vendor-id"; 594 595// These mappings only apply to the host resolver. 596const char kHostResolverRules[] = "host-resolver-rules"; 597 598// Ignores certificate-related errors. 599const char kIgnoreCertificateErrors[] = "ignore-certificate-errors"; 600 601// Ignores GPU blacklist. 602const char kIgnoreGpuBlacklist[] = "ignore-gpu-blacklist"; 603 604// Run the GPU process as a thread in the browser process. 605const char kInProcessGPU[] = "in-process-gpu"; 606 607// Overrides the timeout, in seconds, that a child process waits for a 608// connection from the browser before killing itself. 609const char kIPCConnectionTimeout[] = "ipc-connection-timeout"; 610 611// Specifies the flags passed to JS engine 612const char kJavaScriptFlags[] = "js-flags"; 613 614// Load an NPAPI plugin from the specified path. 615const char kLoadPlugin[] = "load-plugin"; 616 617// Logs GPU control list decisions when enforcing blacklist rules. 618const char kLogGpuControlListDecisions[] = "log-gpu-control-list-decisions"; 619 620// Sets the minimum log level. Valid values are from 0 to 3: 621// INFO = 0, WARNING = 1, LOG_ERROR = 2, LOG_FATAL = 3. 622const char kLoggingLevel[] = "log-level"; 623 624// Enables saving net log events to a file and sets the file name to use. 625const char kLogNetLog[] = "log-net-log"; 626 627// Make plugin processes log their sent and received messages to VLOG(1). 628const char kLogPluginMessages[] = "log-plugin-messages"; 629 630// Sets the width and height above which a composited layer will get tiled. 631const char kMaxUntiledLayerHeight[] = "max-untiled-layer-height"; 632const char kMaxUntiledLayerWidth[] = "max-untiled-layer-width"; 633 634// Sample memory usage with high frequency and store the results to the 635// Renderer.Memory histogram. Used in memory tests. 636const char kMemoryMetrics[] = "memory-metrics"; 637 638// Mutes audio sent to the audio device so it is not audible during 639// automated testing. 640const char kMuteAudio[] = "mute-audio"; 641 642// Don't send HTTP-Referer headers. 643const char kNoReferrers[] = "no-referrers"; 644 645// Disables the sandbox for all process types that are normally sandboxed. 646const char kNoSandbox[] = "no-sandbox"; 647 648// Number of worker threads used to rasterize content. 649const char kNumRasterThreads[] = "num-raster-threads"; 650 651// Enables or disables history navigation in response to horizontal overscroll. 652// Set the value to '1' to enable the feature, and set to '0' to disable. 653// Defaults to enabled. 654const char kOverscrollHistoryNavigation[] = 655 "overscroll-history-navigation"; 656 657// Specifies a command that should be used to launch the plugin process. Useful 658// for running the plugin process through purify or quantify. Ex: 659// --plugin-launcher="path\to\purify /Run=yes" 660const char kPluginLauncher[] = "plugin-launcher"; 661 662// Tells the plugin process the path of the plugin to load 663const char kPluginPath[] = "plugin-path"; 664 665// Causes the process to run as a plugin subprocess. 666const char kPluginProcess[] = "plugin"; 667 668// Causes the plugin process to display a dialog on launch. 669const char kPluginStartupDialog[] = "plugin-startup-dialog"; 670 671// Argument to the process type that indicates a PPAPI broker process type. 672const char kPpapiBrokerProcess[] = "ppapi-broker"; 673 674// "Command-line" arguments for the PPAPI Flash; used for debugging options. 675const char kPpapiFlashArgs[] = "ppapi-flash-args"; 676 677// Runs PPAPI (Pepper) plugins in-process. 678const char kPpapiInProcess[] = "ppapi-in-process"; 679 680// Like kPluginLauncher for PPAPI plugins. 681const char kPpapiPluginLauncher[] = "ppapi-plugin-launcher"; 682 683// Argument to the process type that indicates a PPAPI plugin process type. 684const char kPpapiPluginProcess[] = "ppapi"; 685 686// Causes the PPAPI sub process to display a dialog on launch. Be sure to use 687// --no-sandbox as well or the sandbox won't allow the dialog to display. 688const char kPpapiStartupDialog[] = "ppapi-startup-dialog"; 689 690// Runs a single process for each site (i.e., group of pages from the same 691// registered domain) the user visits. We default to using a renderer process 692// for each site instance (i.e., group of pages from the same registered 693// domain with script connections to each other). 694const char kProcessPerSite[] = "process-per-site"; 695 696// Runs each set of script-connected tabs (i.e., a BrowsingInstance) in its own 697// renderer process. We default to using a renderer process for each 698// site instance (i.e., group of pages from the same registered domain with 699// script connections to each other). 700const char kProcessPerTab[] = "process-per-tab"; 701 702// The value of this switch determines whether the process is started as a 703// renderer or plugin host. If it's empty, it's the browser. 704const char kProcessType[] = "type"; 705 706// Enables more web features over insecure connections. Designed to be used 707// for testing purposes only. 708const char kReduceSecurityForTesting[] = "reduce-security-for-testing"; 709 710// Register Pepper plugins (see pepper_plugin_list.cc for its format). 711const char kRegisterPepperPlugins[] = "register-pepper-plugins"; 712 713// Enables remote debug over HTTP on the specified port. 714const char kRemoteDebuggingPort[] = "remote-debugging-port"; 715 716// Causes the renderer process to throw an assertion on launch. 717const char kRendererAssertTest[] = "renderer-assert-test"; 718 719// On POSIX only: the contents of this flag are prepended to the renderer 720// command line. Useful values might be "valgrind" or "xterm -e gdb --args". 721const char kRendererCmdPrefix[] = "renderer-cmd-prefix"; 722 723// Causes the process to run as renderer instead of as browser. 724const char kRendererProcess[] = "renderer"; 725 726// Overrides the default/calculated limit to the number of renderer processes. 727// Very high values for this setting can lead to high memory/resource usage 728// or instability. 729const char kRendererProcessLimit[] = "renderer-process-limit"; 730 731// Causes the renderer process to display a dialog on launch. 732const char kRendererStartupDialog[] = "renderer-startup-dialog"; 733 734// Causes the process to run as a sandbox IPC subprocess. 735const char kSandboxIPCProcess[] = "sandbox-ipc"; 736 737// Enables or disables scroll end effect in response to vertical overscroll. 738// Set the value to '1' to enable the feature, and set to '0' to disable. 739// Defaults to disabled. 740const char kScrollEndEffect[] = "scroll-end-effect"; 741 742// Visibly render a border around paint rects in the web page to help debug 743// and study painting behavior. 744const char kShowPaintRects[] = "show-paint-rects"; 745 746// Runs the renderer and plugins in the same process as the browser 747const char kSingleProcess[] = "single-process"; 748 749// Experimentally enforces a one-site-per-process security policy. 750// All cross-site navigations force process swaps, and we can restrict a 751// renderer process's access rights based on its site. For details, see: 752// http://www.chromium.org/developers/design-documents/site-isolation 753// 754// Unlike --enable-strict-site-isolation (which allows cross-site iframes), 755// this flag does not affect which cookies are attached to cross-site requests. 756// Support is being added to render cross-site iframes in a different process 757// than their parent pages. 758const char kSitePerProcess[] = "site-per-process"; 759 760// Skip gpu info collection, blacklist loading, and blacklist auto-update 761// scheduling at browser startup time. 762// Therefore, all GPU features are available, and about:gpu page shows empty 763// content. The switch is intended only for layout tests. 764// TODO(gab): Get rid of this switch entirely. 765const char kSkipGpuDataLoading[] = "skip-gpu-data-loading"; 766 767// Specifies if the browser should start in fullscreen mode, like if the user 768// had pressed F11 right after startup. 769const char kStartFullscreen[] = "start-fullscreen"; 770 771// Specifies if the |StatsCollectionController| needs to be bound in the 772// renderer. This binding happens on per-frame basis and hence can potentially 773// be a performance bottleneck. One should only enable it when running a test 774// that needs to access the provided statistics. 775const char kStatsCollectionController[] = 776 "enable-stats-collection-bindings"; 777 778// Upscale defaults to "good". 779const char kTabCaptureDownscaleQuality[] = "tab-capture-downscale-quality"; 780 781// Scaling quality for capturing tab. Should be one of "fast", "good" or "best". 782// One flag for upscaling, one for downscaling. 783// Upscale defaults to "best". 784const char kTabCaptureUpscaleQuality[] = "tab-capture-upscale-quality"; 785 786// Allows for forcing socket connections to http/https to use fixed ports. 787const char kTestingFixedHttpPort[] = "testing-fixed-http-port"; 788const char kTestingFixedHttpsPort[] = "testing-fixed-https-port"; 789 790// Type of the current test harness ("browser" or "ui"). 791const char kTestType[] = "test-type"; 792 793const char kTouchScrollingMode[] = "touch-scrolling-mode"; 794const char kTouchScrollingModeAsyncTouchmove[] = "async-touchmove"; 795const char kTouchScrollingModeSyncTouchmove[] = "sync-touchmove"; 796const char kTouchScrollingModeTouchcancel[] = "touchcancel"; 797 798// Causes TRACE_EVENT flags to be recorded beginning with shutdown. Optionally, 799// can specify the specific trace categories to include (e.g. 800// --trace-shutdown=base,net) otherwise, all events are recorded. 801// --trace-shutdown-file can be used to control where the trace log gets stored 802// to since there is otherwise no way to access the result. 803const char kTraceShutdown[] = "trace-shutdown"; 804 805// If supplied, sets the file which shutdown tracing will be stored into, if 806// omitted the default will be used "chrometrace.log" in the current directory. 807// Has no effect unless --trace-shutdown is also supplied. 808// Example: --trace-shutdown --trace-shutdown-file=/tmp/trace_event.log 809const char kTraceShutdownFile[] = "trace-shutdown-file"; 810 811// Causes TRACE_EVENT flags to be recorded from startup. Optionally, can 812// specify the specific trace categories to include (e.g. 813// --trace-startup=base,net) otherwise, all events are recorded. Setting this 814// flag results in the first call to BeginTracing() to receive all trace events 815// since startup. In Chrome, you may find --trace-startup-file and 816// --trace-startup-duration to control the auto-saving of the trace (not 817// supported in the base-only TraceLog component). 818const char kTraceStartup[] = "trace-startup"; 819 820// Sets the time in seconds until startup tracing ends. If omitted a default of 821// 5 seconds is used. Has no effect without --trace-startup, or if 822// --startup-trace-file=none was supplied. 823const char kTraceStartupDuration[] = "trace-startup-duration"; 824 825// If supplied, sets the file which startup tracing will be stored into, if 826// omitted the default will be used "chrometrace.log" in the current directory. 827// Has no effect unless --trace-startup is also supplied. 828// Example: --trace-startup --trace-startup-file=/tmp/trace_event.log 829// As a special case, can be set to 'none' - this disables automatically saving 830// the result to a file and the first manually recorded trace will then receive 831// all events since startup. 832const char kTraceStartupFile[] = "trace-startup-file"; 833 834 835 836// Prioritizes the UI's command stream in the GPU process 837extern const char kUIPrioritizeInGpuProcess[] = 838 "ui-prioritize-in-gpu-process"; 839 840// Overrides the preferred discardable memory implementation. 841const char kUseDiscardableMemory[] = "use-discardable-memory"; 842 843// Bypass the media stream infobar by selecting the default device for media 844// streams (e.g. WebRTC). Works with --use-fake-device-for-media-stream. 845const char kUseFakeUIForMediaStream[] = "use-fake-ui-for-media-stream"; 846 847// Set when Chromium should use a mobile user agent. 848const char kUseMobileUserAgent[] = "use-mobile-user-agent"; 849 850// Use the new surfaces system to handle compositor delegation. 851const char kUseSurfaces[] = "use-surfaces"; 852 853// On POSIX only: the contents of this flag are prepended to the utility 854// process command line. Useful values might be "valgrind" or "xterm -e gdb 855// --args". 856const char kUtilityCmdPrefix[] = "utility-cmd-prefix"; 857 858// Causes the process to run as a utility subprocess. 859const char kUtilityProcess[] = "utility"; 860 861// The utility process is sandboxed, with access to one directory. This flag 862// specifies the directory that can be accessed. 863const char kUtilityProcessAllowedDir[] = "utility-allowed-dir"; 864 865// Allows MDns to access network in sandboxed process. 866const char kUtilityProcessEnableMDns[] = "utility-enable-mdns"; 867 868const char kUtilityProcessRunningElevated[] = "utility-run-elevated"; 869 870// In debug builds, asserts that the stream of input events is valid. 871const char kValidateInputEventStream[] = "validate-input-event-stream"; 872 873// Will add kWaitForDebugger to every child processes. If a value is passed, it 874// will be used as a filter to determine if the child process should have the 875// kWaitForDebugger flag passed on or not. 876const char kWaitForDebuggerChildren[] = "wait-for-debugger-children"; 877 878// Causes the process to run as a worker subprocess. 879const char kWorkerProcess[] = "worker"; 880 881// The prefix used when starting the zygote process. (i.e. 'gdb --args') 882const char kZygoteCmdPrefix[] = "zygote-cmd-prefix"; 883 884// Causes the process to run as a renderer zygote. 885const char kZygoteProcess[] = "zygote"; 886 887#if defined(ENABLE_WEBRTC) 888// Disables audio processing in a MediaStreamTrack. When this flag is on, AEC, 889// NS and AGC will be done in PeerConnection instead of MediaStreamTrack. 890const char kDisableAudioTrackProcessing[] = "disable-audio-track-processing"; 891 892// Disables WebRTC device enumeration. 893const char kDisableDeviceEnumeration[] = "disable-device-enumeration"; 894 895// Disables HW decode acceleration for WebRTC. 896const char kDisableWebRtcHWDecoding[] = "disable-webrtc-hw-decoding"; 897 898// Disables encryption of RTP Media for WebRTC. When Chrome embeds Content, it 899// ignores this switch on its stable and beta channels. 900const char kDisableWebRtcEncryption[] = "disable-webrtc-encryption"; 901 902// Disables HW encode acceleration for WebRTC. 903const char kDisableWebRtcHWEncoding[] = "disable-webrtc-hw-encoding"; 904 905// Enables VP8 HW encode acceleration for WebRTC. 906const char kEnableWebRtcHWVp8Encoding[] = "enable-webrtc-hw-vp8-encoding"; 907#endif 908 909#if defined(OS_ANDROID) 910// Disable user gesture requirement for media playback. 911const char kDisableGestureRequirementForMediaPlayback[] = 912 "disable-gesture-requirement-for-media-playback"; 913 914// Disable the click delay by sending click events during double tap. 915const char kDisableClickDelay[] = "disable-click-delay"; 916 917// Disable overscroll edge effects like those found in Android views. 918const char kDisableOverscrollEdgeEffect[] = "disable-overscroll-edge-effect"; 919 920// WebRTC is enabled by default on Android. 921const char kDisableWebRTC[] = "disable-webrtc"; 922 923// Enable the recognition part of the Web Speech API. 924const char kEnableSpeechRecognition[] = "enable-speech-recognition"; 925 926// Always use the video overlay for the embedded video. 927// This switch is intended only for tests. 928const char kForceUseOverlayEmbeddedVideo[] = "force-use-overlay-embedded-video"; 929 930// The telephony region (ISO country code) to use in phone number detection. 931const char kNetworkCountryIso[] = "network-country-iso"; 932 933// Enables remote debug over HTTP on the specified socket name. 934const char kRemoteDebuggingSocketName[] = "remote-debugging-socket-name"; 935#endif 936 937// Disable web audio API. 938const char kDisableWebAudio[] = "disable-webaudio"; 939 940#if defined(OS_CHROMEOS) 941// Disables panel fitting (used for mirror mode). 942const char kDisablePanelFitting[] = "disable-panel-fitting"; 943#endif 944 945#if defined(OS_MACOSX) && !defined(OS_IOS) 946const char kEnableCarbonInterposing[] = "enable-carbon-interposing"; 947 948// Disables support for Core Animation plugins. This is triggered when 949// accelerated compositing is disabled. See http://crbug.com/122430 . 950const char kDisableCoreAnimationPlugins[] = 951 "disable-core-animation-plugins"; 952#endif 953 954#if defined(OS_WIN) 955// Device scale factor passed to certain processes like renderers, etc. 956const char kDeviceScaleFactor[] = "device-scale-factor"; 957 958// Disables the DirectWrite font rendering system on windows. 959const char kDisableDirectWrite[] = "disable-direct-write"; 960 961// Disable the Legacy Window which corresponds to the size of the WebContents. 962const char kDisableLegacyIntermediateWindow[] = "disable-legacy-window"; 963 964// Use high resolution timers for TimeTicks. 965const char kEnableHighResolutionTime[] = "enable-high-resolution-time"; 966 967// Enable the Win32K process mitigation policy for renderer processes which 968// prevents them from invoking user32 and gdi32 system calls which enter 969// the kernel. This is only supported on Windows 8 and beyond. 970const char kEnableWin32kRendererLockDown[] 971 = "enable_win32k_renderer_lockdown"; 972#endif 973 974// Don't dump stuff here, follow the same order as the header. 975 976} // namespace switches 977