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   WebRuntimeFeatures::enableCompositedSelectionUpdate(true);
  63   // If navigation transitions gets activated via field trial, enable it in
  64   // blink. We don't set this to false in case the user has manually enabled
  65   // the feature via experimental web platform features.
  66   if (base::FieldTrialList::FindFullName("NavigationTransitions") == "Enabled")
  67     WebRuntimeFeatures::enableNavigationTransitions(true);
  68   // Android won't be able to reliably support non-persistent notifications, the
  69   // intended behavior for which is in flux by itself.
  70   WebRuntimeFeatures::enableNotificationConstructor(false);
  71 #else
  72   WebRuntimeFeatures::enableNavigatorContentUtils(true);
  73 #endif  // defined(OS_ANDROID)
  74
  75 #if !(defined OS_ANDROID || defined OS_CHROMEOS || defined OS_IOS)
  76     // Only Android, ChromeOS, and IOS support NetInfo right now.
  77     WebRuntimeFeatures::enableNetworkInformation(false);
  78 #endif
  79
  80 #if defined(OS_WIN)
  81   // Screen Orientation API is currently broken on Windows 8 Metro mode and
  82   // until we can find how to disable it only for Blink instances running in a
  83   // renderer process in Metro, we need to disable the API altogether for Win8.
  84   // See http://crbug.com/400846
  85   if (base::win::OSInfo::GetInstance()->version() >= base::win::VERSION_WIN8)
  86     WebRuntimeFeatures::enableScreenOrientation(false);
  87 #endif // OS_WIN
  88 }
  89
  90 void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
  91     const base::CommandLine& command_line) {
  92   if (command_line.HasSwitch(switches::kEnableExperimentalWebPlatformFeatures))
  93     WebRuntimeFeatures::enableExperimentalFeatures(true);
  94
  95   SetRuntimeFeatureDefaultsForPlatform();
  96
  97   if (command_line.HasSwitch(switches::kDisableDatabases))
  98     WebRuntimeFeatures::enableDatabase(false);
  99
 100   if (command_line.HasSwitch(scheduler::switches::kDisableBlinkScheduler))
 101     WebRuntimeFeatures::enableBlinkScheduler(false);
 102
 103   if (command_line.HasSwitch(switches::kDisableMediaSource))
 104     WebRuntimeFeatures::enableMediaSource(false);
 105
 106   if (command_line.HasSwitch(switches::kDisableNotifications)) {
 107     WebRuntimeFeatures::enableNotifications(false);
 108
 109     // Chrome's Push Messaging implementation relies on Web Notifications.
 110     WebRuntimeFeatures::enablePushMessaging(false);
 111   }
 112
 113   if (command_line.HasSwitch(switches::kDisableSharedWorkers))
 114     WebRuntimeFeatures::enableSharedWorker(false);
 115
 116 #if defined(OS_ANDROID)
 117   // WebAudio is enabled by default on ARM and X86, if the MediaCodec
 118   // API is available.
 119   WebRuntimeFeatures::enableWebAudio(
 120       !command_line.HasSwitch(switches::kDisableWebAudio) &&
 121       media::MediaCodecBridge::IsAvailable());
 122 #else
 123   if (command_line.HasSwitch(switches::kDisableWebAudio))
 124     WebRuntimeFeatures::enableWebAudio(false);
 125 #endif
 126
 127   if (command_line.HasSwitch(switches::kDisableEncryptedMedia))
 128     WebRuntimeFeatures::enableEncryptedMedia(false);
 129
 130   if (command_line.HasSwitch(switches::kDisablePrefixedEncryptedMedia))
 131     WebRuntimeFeatures::enablePrefixedEncryptedMedia(false);
 132
 133   if (command_line.HasSwitch(switches::kDisableFileSystem))
 134     WebRuntimeFeatures::enableFileSystem(false);
 135
 136   if (command_line.HasSwitch(switches::kEnableExperimentalCanvasFeatures))
 137     WebRuntimeFeatures::enableExperimentalCanvasFeatures(true);
 138
 139   if (!command_line.HasSwitch(switches::kDisableAcceleratedJpegDecoding))
 140     WebRuntimeFeatures::enableDecodeToYUV(true);
 141
 142   if (command_line.HasSwitch(switches::kEnableDisplayList2dCanvas))
 143     WebRuntimeFeatures::enableDisplayList2dCanvas(true);
 144
 145   if (command_line.HasSwitch(switches::kDisableDisplayList2dCanvas))
 146     WebRuntimeFeatures::enableDisplayList2dCanvas(false);
 147
 148   if (command_line.HasSwitch(switches::kForceDisplayList2dCanvas))
 149     WebRuntimeFeatures::forceDisplayList2dCanvas(true);
 150
 151   if (command_line.HasSwitch(switches::kEnableWebGLDraftExtensions))
 152     WebRuntimeFeatures::enableWebGLDraftExtensions(true);
 153
 154   if (command_line.HasSwitch(switches::kEnableWebGLImageChromium))
 155     WebRuntimeFeatures::enableWebGLImageChromium(true);
 156
 157   if (command_line.HasSwitch(switches::kEnableOverlayFullscreenVideo))
 158     WebRuntimeFeatures::enableOverlayFullscreenVideo(true);
 159
 160   if (ui::IsOverlayScrollbarEnabled())
 161     WebRuntimeFeatures::enableOverlayScrollbars(true);
 162
 163   if (command_line.HasSwitch(switches::kEnableBleedingEdgeRenderingFastPaths))
 164     WebRuntimeFeatures::enableBleedingEdgeFastPaths(true);
 165
 166   if (command_line.HasSwitch(switches::kEnablePreciseMemoryInfo))
 167     WebRuntimeFeatures::enablePreciseMemoryInfo(true);
 168
 169   if (command_line.HasSwitch(switches::kEnableNetworkInformation) ||
 170       command_line.HasSwitch(
 171           switches::kEnableExperimentalWebPlatformFeatures)) {
 172     WebRuntimeFeatures::enableNetworkInformation(true);
 173   }
 174
 175   if (command_line.HasSwitch(switches::kEnableCredentialManagerAPI))
 176     WebRuntimeFeatures::enableCredentialManagerAPI(true);
 177
 178   if (command_line.HasSwitch(switches::kDisableSVG1DOM)) {
 179     WebRuntimeFeatures::enableSVG1DOM(false);
 180   }
 181
 182   if (command_line.HasSwitch(switches::kReducedReferrerGranularity))
 183     WebRuntimeFeatures::enableReducedReferrerGranularity(true);
 184
 185   if (command_line.HasSwitch(switches::kEnablePushMessagePayload))
 186     WebRuntimeFeatures::enablePushMessagingData(true);
 187
 188   if (command_line.HasSwitch(switches::kEnablePushMessagingHasPermission))
 189     WebRuntimeFeatures::enablePushMessagingHasPermission(true);
 190
 191   // Delete "StaleWhileRevalidate" line from chrome_browser_field_trials.cc
 192   // when this experiment is done.
 193   if (base::FieldTrialList::FindFullName("StaleWhileRevalidate") == "Enabled" ||
 194       command_line.HasSwitch(switches::kEnableStaleWhileRevalidate))
 195     WebRuntimeFeatures::enableStaleWhileRevalidateCacheControl(true);
 196
 197   if (command_line.HasSwitch(switches::kDisableV8IdleTasks))
 198     WebRuntimeFeatures::enableV8IdleTasks(false);
 199   else
 200     WebRuntimeFeatures::enableV8IdleTasks(true);
 201
 202   if (command_line.HasSwitch(switches::kEnableUnsafeES3APIs))
 203     WebRuntimeFeatures::enableUnsafeES3APIs(true);
 204
 205   // Enable explicitly enabled features, and then disable explicitly disabled
 206   // ones.
 207   if (command_line.HasSwitch(switches::kEnableBlinkFeatures)) {
 208     std::vector<std::string> enabled_features;
 209     base::SplitString(
 210         command_line.GetSwitchValueASCII(switches::kEnableBlinkFeatures), ',',
 211         &enabled_features);
 212     for (const std::string& feature : enabled_features) {
 213       WebRuntimeFeatures::enableFeatureFromString(
 214           blink::WebString::fromLatin1(feature), true);
 215     }
 216   }
 217   if (command_line.HasSwitch(switches::kDisableBlinkFeatures)) {
 218     std::vector<std::string> disabled_features;
 219     base::SplitString(
 220         command_line.GetSwitchValueASCII(switches::kDisableBlinkFeatures), ',',
 221         &disabled_features);
 222     for (const std::string& feature : disabled_features) {
 223       WebRuntimeFeatures::enableFeatureFromString(
 224           blink::WebString::fromLatin1(feature), false);
 225     }
 226   }
 227 }
 228
 229 }  // namespace content