content/child/runtime_features.cc

   1 // Copyright 2013 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/child/runtime_features.h"
   6
   7 #include <vector>
   8
   9 #include "base/command_line.h"
  10 #include "base/metrics/field_trial.h"
  11 #include "base/strings/string_split.h"
  12 #include "components/scheduler/common/scheduler_switches.h"
  13 #include "content/common/content_switches_internal.h"
  14 #include "content/public/common/content_switches.h"
  15 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
  16 #include "ui/gl/gl_switches.h"
  17 #include "ui/native_theme/native_theme_switches.h"
  18
  19 #if defined(OS_ANDROID)
  20 #include <cpu-features.h>
  21 #include "base/android/build_info.h"
  22 #include "base/metrics/field_trial.h"
  23 #include "media/base/android/media_codec_bridge.h"
  24 #elif defined(OS_WIN)
  25 #include "base/win/windows_version.h"
  26 #endif
  27
  28 using blink::WebRuntimeFeatures;
  29
  30 namespace content {
  31
  32 static void SetRuntimeFeatureDefaultsForPlatform() {
  33   // Enable non-standard "apple-touch-icon" and "apple-touch-icon-precomposed".
  34   WebRuntimeFeatures::enableTouchIconLoading(true);
  35
  36 #if defined(OS_ANDROID)
  37   // MSE/EME implementation needs Android MediaCodec API.
  38   if (!media::MediaCodecBridge::IsAvailable()) {
  39     WebRuntimeFeatures::enableMediaSource(false);
  40     WebRuntimeFeatures::enablePrefixedEncryptedMedia(false);
  41     WebRuntimeFeatures::enableEncryptedMedia(false);
  42   }
  43   // WebAudio is enabled by default but only when the MediaCodec API
  44   // is available.
  45   AndroidCpuFamily cpu_family = android_getCpuFamily();
  46   WebRuntimeFeatures::enableWebAudio(
  47       media::MediaCodecBridge::IsAvailable() &&
  48       ((cpu_family == ANDROID_CPU_FAMILY_ARM) ||
  49        (cpu_family == ANDROID_CPU_FAMILY_ARM64) ||
  50        (cpu_family == ANDROID_CPU_FAMILY_X86) ||
  51        (cpu_family == ANDROID_CPU_FAMILY_MIPS)));
  52
  53   // Android does not have support for PagePopup
  54   WebRuntimeFeatures::enablePagePopup(false);
  55   // Android does not yet support SharedWorker. crbug.com/154571
  56   WebRuntimeFeatures::enableSharedWorker(false);
  57   // Android does not yet support NavigatorContentUtils.
  58   WebRuntimeFeatures::enableNavigatorContentUtils(false);
  59   WebRuntimeFeatures::enableOrientationEvent(true);
  60   WebRuntimeFeatures::enableFastMobileScrolling(true);
  61   WebRuntimeFeatures::enableMediaCapture(true);
  62   // Android won't be able to reliably support non-persistent notifications, the
  63   // intended behavior for which is in flux by itself.
  64   WebRuntimeFeatures::enableNotificationConstructor(false);
  65   WebRuntimeFeatures::enableNewMediaPlaybackUi(true);
  66 #else
  67   WebRuntimeFeatures::enableNavigatorContentUtils(true);
  68 #endif  // defined(OS_ANDROID)
  69
  70 #if defined(OS_ANDROID) || defined(USE_AURA)
  71   WebRuntimeFeatures::enableCompositedSelectionUpdate(true);
  72 #endif
  73
  74 #if !(defined OS_ANDROID || defined OS_CHROMEOS || defined OS_IOS)
  75     // Only Android, ChromeOS, and IOS support NetInfo right now.
  76     WebRuntimeFeatures::enableNetworkInformation(false);
  77 #endif
  78
  79 #if defined(OS_WIN)
  80   // Screen Orientation API is currently broken on Windows 8 Metro mode and
  81   // until we can find how to disable it only for Blink instances running in a
  82   // renderer process in Metro, we need to disable the API altogether for Win8.
  83   // See http://crbug.com/400846
  84   if (base::win::OSInfo::GetInstance()->version() >= base::win::VERSION_WIN8)
  85     WebRuntimeFeatures::enableScreenOrientation(false);
  86 #endif // OS_WIN
  87 }
  88
  89 void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
  90     const base::CommandLine& command_line) {
  91   if (command_line.HasSwitch(switches::kEnableExperimentalWebPlatformFeatures))
  92     WebRuntimeFeatures::enableExperimentalFeatures(true);
  93
  94   if (command_line.HasSwitch(switches::kEnableWebBluetooth))
  95     WebRuntimeFeatures::enableWebBluetooth(true);
  96
  97   SetRuntimeFeatureDefaultsForPlatform();
  98
  99   if (command_line.HasSwitch(switches::kDisableDatabases))
 100     WebRuntimeFeatures::enableDatabase(false);
 101
 102   if (command_line.HasSwitch(switches::kDisableMediaSource))
 103     WebRuntimeFeatures::enableMediaSource(false);
 104
 105   if (command_line.HasSwitch(switches::kDisableNotifications)) {
 106     WebRuntimeFeatures::enableNotifications(false);
 107
 108     // Chrome's Push Messaging implementation relies on Web Notifications.
 109     WebRuntimeFeatures::enablePushMessaging(false);
 110   }
 111
 112   if (command_line.HasSwitch(switches::kDisableSharedWorkers))
 113     WebRuntimeFeatures::enableSharedWorker(false);
 114
 115 #if defined(OS_ANDROID)
 116   // WebAudio is enabled by default on ARM and X86, if the MediaCodec
 117   // API is available.
 118   WebRuntimeFeatures::enableWebAudio(
 119       !command_line.HasSwitch(switches::kDisableWebAudio) &&
 120       media::MediaCodecBridge::IsAvailable());
 121 #else
 122   if (command_line.HasSwitch(switches::kDisableWebAudio))
 123     WebRuntimeFeatures::enableWebAudio(false);
 124 #endif
 125
 126   if (command_line.HasSwitch(switches::kDisableSpeechAPI))
 127     WebRuntimeFeatures::enableScriptedSpeech(false);
 128
 129   if (command_line.HasSwitch(switches::kDisableEncryptedMedia))
 130     WebRuntimeFeatures::enableEncryptedMedia(false);
 131
 132   if (command_line.HasSwitch(switches::kDisablePrefixedEncryptedMedia))
 133     WebRuntimeFeatures::enablePrefixedEncryptedMedia(false);
 134
 135   if (command_line.HasSwitch(switches::kDisableFileSystem))
 136     WebRuntimeFeatures::enableFileSystem(false);
 137
 138   if (command_line.HasSwitch(switches::kEnableExperimentalCanvasFeatures))
 139     WebRuntimeFeatures::enableExperimentalCanvasFeatures(true);
 140
 141   if (!command_line.HasSwitch(switches::kDisableAcceleratedJpegDecoding))
 142     WebRuntimeFeatures::enableDecodeToYUV(true);
 143
 144   if (command_line.HasSwitch(switches::kEnableDisplayList2dCanvas))
 145     WebRuntimeFeatures::enableDisplayList2dCanvas(true);
 146
 147   if (command_line.HasSwitch(switches::kDisableDisplayList2dCanvas))
 148     WebRuntimeFeatures::enableDisplayList2dCanvas(false);
 149
 150   if (command_line.HasSwitch(switches::kForceDisplayList2dCanvas))
 151     WebRuntimeFeatures::forceDisplayList2dCanvas(true);
 152
 153   if (command_line.HasSwitch(switches::kEnableWebGLDraftExtensions))
 154     WebRuntimeFeatures::enableWebGLDraftExtensions(true);
 155
 156   if (command_line.HasSwitch(switches::kEnableWebGLImageChromium))
 157     WebRuntimeFeatures::enableWebGLImageChromium(true);
 158
 159   if (command_line.HasSwitch(switches::kEnableOverlayFullscreenVideo))
 160     WebRuntimeFeatures::enableOverlayFullscreenVideo(true);
 161
 162   if (ui::IsOverlayScrollbarEnabled())
 163     WebRuntimeFeatures::enableOverlayScrollbars(true);
 164
 165   if (command_line.HasSwitch(switches::kEnableBleedingEdgeRenderingFastPaths))
 166     WebRuntimeFeatures::enableBleedingEdgeFastPaths(true);
 167
 168   if (command_line.HasSwitch(switches::kEnablePreciseMemoryInfo))
 169     WebRuntimeFeatures::enablePreciseMemoryInfo(true);
 170
 171   if (command_line.HasSwitch(switches::kEnableNetworkInformation) ||
 172       command_line.HasSwitch(
 173           switches::kEnableExperimentalWebPlatformFeatures)) {
 174     WebRuntimeFeatures::enableNetworkInformation(true);
 175   }
 176
 177   if (command_line.HasSwitch(switches::kEnableCredentialManagerAPI))
 178     WebRuntimeFeatures::enableCredentialManagerAPI(true);
 179
 180   if (command_line.HasSwitch(switches::kDisableSVG1DOM)) {
 181     WebRuntimeFeatures::enableSVG1DOM(false);
 182   }
 183
 184   if (command_line.HasSwitch(switches::kReducedReferrerGranularity))
 185     WebRuntimeFeatures::enableReducedReferrerGranularity(true);
 186
 187   if (command_line.HasSwitch(switches::kEnablePushMessagePayload))
 188     WebRuntimeFeatures::enablePushMessagingData(true);
 189
 190   if (command_line.HasSwitch(switches::kDisablePermissionsAPI))
 191     WebRuntimeFeatures::enablePermissionsAPI(false);
 192
 193   // Delete "StaleWhileRevalidate" line from chrome_browser_field_trials.cc
 194   // when this experiment is done.
 195   if (base::FieldTrialList::FindFullName("StaleWhileRevalidate") == "Enabled" ||
 196       command_line.HasSwitch(switches::kEnableStaleWhileRevalidate))
 197     WebRuntimeFeatures::enableStaleWhileRevalidateCacheControl(true);
 198
 199   if (command_line.HasSwitch(switches::kDisableV8IdleTasks))
 200     WebRuntimeFeatures::enableV8IdleTasks(false);
 201   else
 202     WebRuntimeFeatures::enableV8IdleTasks(true);
 203
 204   if (command_line.HasSwitch(switches::kEnableUnsafeES3APIs))
 205     WebRuntimeFeatures::enableUnsafeES3APIs(true);
 206
 207   if (command_line.HasSwitch(switches::kEnableWebVR)) {
 208     WebRuntimeFeatures::enableWebVR(true);
 209     WebRuntimeFeatures::enableFeatureFromString(
 210         std::string("GeometryInterfaces"), true);
 211   }
 212
 213   // Enable explicitly enabled features, and then disable explicitly disabled
 214   // ones.
 215   if (command_line.HasSwitch(switches::kEnableBlinkFeatures)) {
 216     std::vector<std::string> enabled_features = base::SplitString(
 217         command_line.GetSwitchValueASCII(switches::kEnableBlinkFeatures),
 218         ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
 219     for (const std::string& feature : enabled_features)
 220       WebRuntimeFeatures::enableFeatureFromString(feature, true);
 221   }
 222   if (command_line.HasSwitch(switches::kDisableBlinkFeatures)) {
 223     std::vector<std::string> disabled_features = base::SplitString(
 224         command_line.GetSwitchValueASCII(switches::kDisableBlinkFeatures),
 225         ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
 226     for (const std::string& feature : disabled_features)
 227       WebRuntimeFeatures::enableFeatureFromString(feature, false);
 228   }
 229 }
 230
 231 }  // namespace content