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   // Android won't be able to reliably support non-persistent notifications, the
  64   // intended behavior for which is in flux by itself.
  65   WebRuntimeFeatures::enableNotificationConstructor(false);
  66 #else
  67   WebRuntimeFeatures::enableNavigatorContentUtils(true);
  68 #endif  // defined(OS_ANDROID)
  69
  70 #if !(defined OS_ANDROID || defined OS_CHROMEOS || defined OS_IOS)
  71     // Only Android, ChromeOS, and IOS support NetInfo right now.
  72     WebRuntimeFeatures::enableNetworkInformation(false);
  73 #endif
  74
  75 #if defined(OS_WIN)
  76   // Screen Orientation API is currently broken on Windows 8 Metro mode and
  77   // until we can find how to disable it only for Blink instances running in a
  78   // renderer process in Metro, we need to disable the API altogether for Win8.
  79   // See http://crbug.com/400846
  80   if (base::win::OSInfo::GetInstance()->version() >= base::win::VERSION_WIN8)
  81     WebRuntimeFeatures::enableScreenOrientation(false);
  82 #endif // OS_WIN
  83 }
  84
  85 void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
  86     const base::CommandLine& command_line) {
  87   if (command_line.HasSwitch(switches::kEnableExperimentalWebPlatformFeatures))
  88     WebRuntimeFeatures::enableExperimentalFeatures(true);
  89
  90   if (command_line.HasSwitch(switches::kEnableWebBluetooth))
  91     WebRuntimeFeatures::enableWebBluetooth(true);
  92
  93   SetRuntimeFeatureDefaultsForPlatform();
  94
  95   if (command_line.HasSwitch(switches::kDisableDatabases))
  96     WebRuntimeFeatures::enableDatabase(false);
  97
  98   if (command_line.HasSwitch(switches::kDisableMediaSource))
  99     WebRuntimeFeatures::enableMediaSource(false);
 100
 101   if (command_line.HasSwitch(switches::kDisableNotifications)) {
 102     WebRuntimeFeatures::enableNotifications(false);
 103
 104     // Chrome's Push Messaging implementation relies on Web Notifications.
 105     WebRuntimeFeatures::enablePushMessaging(false);
 106   }
 107
 108   if (command_line.HasSwitch(switches::kDisableSharedWorkers))
 109     WebRuntimeFeatures::enableSharedWorker(false);
 110
 111 #if defined(OS_ANDROID)
 112   // WebAudio is enabled by default on ARM and X86, if the MediaCodec
 113   // API is available.
 114   WebRuntimeFeatures::enableWebAudio(
 115       !command_line.HasSwitch(switches::kDisableWebAudio) &&
 116       media::MediaCodecBridge::IsAvailable());
 117 #else
 118   if (command_line.HasSwitch(switches::kDisableWebAudio))
 119     WebRuntimeFeatures::enableWebAudio(false);
 120 #endif
 121
 122   if (command_line.HasSwitch(switches::kDisableSpeechAPI))
 123     WebRuntimeFeatures::enableScriptedSpeech(false);
 124
 125   if (command_line.HasSwitch(switches::kDisableEncryptedMedia))
 126     WebRuntimeFeatures::enableEncryptedMedia(false);
 127
 128   if (command_line.HasSwitch(switches::kDisablePrefixedEncryptedMedia))
 129     WebRuntimeFeatures::enablePrefixedEncryptedMedia(false);
 130
 131   if (command_line.HasSwitch(switches::kDisableFileSystem))
 132     WebRuntimeFeatures::enableFileSystem(false);
 133
 134   if (command_line.HasSwitch(switches::kEnableExperimentalCanvasFeatures))
 135     WebRuntimeFeatures::enableExperimentalCanvasFeatures(true);
 136
 137   if (!command_line.HasSwitch(switches::kDisableAcceleratedJpegDecoding))
 138     WebRuntimeFeatures::enableDecodeToYUV(true);
 139
 140   if (command_line.HasSwitch(switches::kEnableDisplayList2dCanvas))
 141     WebRuntimeFeatures::enableDisplayList2dCanvas(true);
 142
 143   if (command_line.HasSwitch(switches::kDisableDisplayList2dCanvas))
 144     WebRuntimeFeatures::enableDisplayList2dCanvas(false);
 145
 146   if (command_line.HasSwitch(switches::kForceDisplayList2dCanvas))
 147     WebRuntimeFeatures::forceDisplayList2dCanvas(true);
 148
 149   if (command_line.HasSwitch(switches::kEnableWebGLDraftExtensions))
 150     WebRuntimeFeatures::enableWebGLDraftExtensions(true);
 151
 152   if (command_line.HasSwitch(switches::kEnableWebGLImageChromium))
 153     WebRuntimeFeatures::enableWebGLImageChromium(true);
 154
 155   if (command_line.HasSwitch(switches::kEnableOverlayFullscreenVideo))
 156     WebRuntimeFeatures::enableOverlayFullscreenVideo(true);
 157
 158   if (ui::IsOverlayScrollbarEnabled())
 159     WebRuntimeFeatures::enableOverlayScrollbars(true);
 160
 161   if (command_line.HasSwitch(switches::kEnableBleedingEdgeRenderingFastPaths))
 162     WebRuntimeFeatures::enableBleedingEdgeFastPaths(true);
 163
 164   if (command_line.HasSwitch(switches::kEnablePreciseMemoryInfo))
 165     WebRuntimeFeatures::enablePreciseMemoryInfo(true);
 166
 167   if (command_line.HasSwitch(switches::kEnableNetworkInformation) ||
 168       command_line.HasSwitch(
 169           switches::kEnableExperimentalWebPlatformFeatures)) {
 170     WebRuntimeFeatures::enableNetworkInformation(true);
 171   }
 172
 173   if (command_line.HasSwitch(switches::kEnableCredentialManagerAPI))
 174     WebRuntimeFeatures::enableCredentialManagerAPI(true);
 175
 176   if (command_line.HasSwitch(switches::kDisableSVG1DOM)) {
 177     WebRuntimeFeatures::enableSVG1DOM(false);
 178   }
 179
 180   if (command_line.HasSwitch(switches::kReducedReferrerGranularity))
 181     WebRuntimeFeatures::enableReducedReferrerGranularity(true);
 182
 183   if (command_line.HasSwitch(switches::kEnablePushMessagePayload))
 184     WebRuntimeFeatures::enablePushMessagingData(true);
 185
 186   if (command_line.HasSwitch(switches::kDisablePermissionsAPI))
 187     WebRuntimeFeatures::enablePermissionsAPI(false);
 188
 189   // Delete "StaleWhileRevalidate" line from chrome_browser_field_trials.cc
 190   // when this experiment is done.
 191   if (base::FieldTrialList::FindFullName("StaleWhileRevalidate") == "Enabled" ||
 192       command_line.HasSwitch(switches::kEnableStaleWhileRevalidate))
 193     WebRuntimeFeatures::enableStaleWhileRevalidateCacheControl(true);
 194
 195   if (command_line.HasSwitch(switches::kDisableV8IdleTasks))
 196     WebRuntimeFeatures::enableV8IdleTasks(false);
 197   else
 198     WebRuntimeFeatures::enableV8IdleTasks(true);
 199
 200   if (command_line.HasSwitch(switches::kEnableUnsafeES3APIs))
 201     WebRuntimeFeatures::enableUnsafeES3APIs(true);
 202
 203   if (command_line.HasSwitch(switches::kEnableWebVR)) {
 204     WebRuntimeFeatures::enableWebVR(true);
 205     WebRuntimeFeatures::enableFeatureFromString("GeometryInterfaces", true);
 206   }
 207
 208   // Enable explicitly enabled features, and then disable explicitly disabled
 209   // ones.
 210   if (command_line.HasSwitch(switches::kEnableBlinkFeatures)) {
 211     std::vector<std::string> enabled_features;
 212     base::SplitString(
 213         command_line.GetSwitchValueASCII(switches::kEnableBlinkFeatures), ',',
 214         &enabled_features);
 215     for (const std::string& feature : enabled_features) {
 216       WebRuntimeFeatures::enableFeatureFromString(
 217           blink::WebString::fromLatin1(feature), true);
 218     }
 219   }
 220   if (command_line.HasSwitch(switches::kDisableBlinkFeatures)) {
 221     std::vector<std::string> disabled_features;
 222     base::SplitString(
 223         command_line.GetSwitchValueASCII(switches::kDisableBlinkFeatures), ',',
 224         &disabled_features);
 225     for (const std::string& feature : disabled_features) {
 226       WebRuntimeFeatures::enableFeatureFromString(
 227           blink::WebString::fromLatin1(feature), false);
 228     }
 229   }
 230 }
 231
 232 }  // namespace content