runtime_features.cc revision 6e8cce623b6e4fe0c9e4af605d675dd9d0338c38 
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 "base/command_line.h"
8#include "content/common/content_switches_internal.h"
9#include "content/public/common/content_switches.h"
10#include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
11#include "ui/native_theme/native_theme_switches.h"
12
13#if defined(OS_ANDROID)
14#include <cpu-features.h>
15#include "base/android/build_info.h"
16#include "base/metrics/field_trial.h"
17#include "media/base/android/media_codec_bridge.h"
18#elif defined(OS_WIN)
19#include "base/win/windows_version.h"
20#endif
21
22using blink::WebRuntimeFeatures;
23
24namespace content {
25
26static void SetRuntimeFeatureDefaultsForPlatform() {
27#if defined(OS_ANDROID)
28  // MSE/EME implementation needs Android MediaCodec API.
29  if (!media::MediaCodecBridge::IsAvailable()) {
30    WebRuntimeFeatures::enableMediaSource(false);
31    WebRuntimeFeatures::enablePrefixedEncryptedMedia(false);
32    WebRuntimeFeatures::enableEncryptedMedia(false);
33  }
34  // WebAudio is enabled by default but only when the MediaCodec API
35  // is available.
36  AndroidCpuFamily cpu_family = android_getCpuFamily();
37  WebRuntimeFeatures::enableWebAudio(
38      media::MediaCodecBridge::IsAvailable() &&
39      ((cpu_family == ANDROID_CPU_FAMILY_ARM) ||
40       (cpu_family == ANDROID_CPU_FAMILY_ARM64) ||
41       (cpu_family == ANDROID_CPU_FAMILY_X86) ||
42       (cpu_family == ANDROID_CPU_FAMILY_MIPS)));
43
44  // Android supports gamepad API for JellyBean and beyond
45  WebRuntimeFeatures::enableGamepad(
46      base::android::BuildInfo::GetInstance()->sdk_int() >= 16);
47  // Android does not have support for PagePopup
48  WebRuntimeFeatures::enablePagePopup(false);
49  // Android does not yet support the Web Notification API. crbug.com/115320
50  WebRuntimeFeatures::enableNotifications(false);
51  // Android does not yet support SharedWorker. crbug.com/154571
52  WebRuntimeFeatures::enableSharedWorker(false);
53  // Android does not yet support NavigatorContentUtils.
54  WebRuntimeFeatures::enableNavigatorContentUtils(false);
55  WebRuntimeFeatures::enableTouchIconLoading(true);
56  WebRuntimeFeatures::enableOrientationEvent(true);
57  WebRuntimeFeatures::enableFastMobileScrolling(true);
58  WebRuntimeFeatures::enableMediaCapture(true);
59  // If navigation transitions gets activated via field trial, enable it in
60  // blink. We don't set this to false in case the user has manually enabled
61  // the feature via experimental web platform features.
62  if (base::FieldTrialList::FindFullName("NavigationTransitions") == "Enabled")
63    WebRuntimeFeatures::enableNavigationTransitions(true);
64#else
65  WebRuntimeFeatures::enableNavigatorContentUtils(true);
66#endif  // defined(OS_ANDROID)
67
68#if !(defined OS_ANDROID || defined OS_CHROMEOS || defined OS_IOS)
69    // Only Android, ChromeOS, and IOS support NetInfo right now.
70    WebRuntimeFeatures::enableNetworkInformation(false);
71#endif
72
73#if defined(OS_WIN)
74  // Screen Orientation API is currently broken on Windows 8 Metro mode and
75  // until we can find how to disable it only for Blink instances running in a
76  // renderer process in Metro, we need to disable the API altogether for Win8.
77  // See http://crbug.com/400846
78  if (base::win::OSInfo::GetInstance()->version() >= base::win::VERSION_WIN8)
79    WebRuntimeFeatures::enableScreenOrientation(false);
80#endif // OS_WIN
81}
82
83void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
84    const base::CommandLine& command_line) {
85  if (command_line.HasSwitch(switches::kEnableExperimentalWebPlatformFeatures))
86    WebRuntimeFeatures::enableExperimentalFeatures(true);
87
88  SetRuntimeFeatureDefaultsForPlatform();
89
90  if (command_line.HasSwitch(switches::kDisableDatabases))
91    WebRuntimeFeatures::enableDatabase(false);
92
93  if (command_line.HasSwitch(switches::kDisableApplicationCache))
94    WebRuntimeFeatures::enableApplicationCache(false);
95
96  if (command_line.HasSwitch(switches::kDisableDesktopNotifications))
97    WebRuntimeFeatures::enableNotifications(false);
98
99  if (command_line.HasSwitch(switches::kDisableLocalStorage))
100    WebRuntimeFeatures::enableLocalStorage(false);
101
102  if (command_line.HasSwitch(switches::kDisableSessionStorage))
103    WebRuntimeFeatures::enableSessionStorage(false);
104
105  if (command_line.HasSwitch(switches::kDisableMediaSource))
106    WebRuntimeFeatures::enableMediaSource(false);
107
108  if (command_line.HasSwitch(switches::kDisableSharedWorkers))
109    WebRuntimeFeatures::enableSharedWorker(false);
110
111#if defined(OS_ANDROID)
112  if (command_line.HasSwitch(switches::kDisableWebRTC)) {
113    WebRuntimeFeatures::enableMediaStream(false);
114    WebRuntimeFeatures::enablePeerConnection(false);
115  }
116
117  if (!command_line.HasSwitch(switches::kEnableSpeechRecognition))
118    WebRuntimeFeatures::enableScriptedSpeech(false);
119
120  // WebAudio is enabled by default on ARM and X86, if the MediaCodec
121  // API is available.
122  WebRuntimeFeatures::enableWebAudio(
123      !command_line.HasSwitch(switches::kDisableWebAudio) &&
124      media::MediaCodecBridge::IsAvailable());
125#else
126  if (command_line.HasSwitch(switches::kDisableWebAudio))
127    WebRuntimeFeatures::enableWebAudio(false);
128#endif
129
130  if (command_line.HasSwitch(switches::kEnableEncryptedMedia))
131    WebRuntimeFeatures::enableEncryptedMedia(true);
132
133  if (command_line.HasSwitch(switches::kDisablePrefixedEncryptedMedia))
134    WebRuntimeFeatures::enablePrefixedEncryptedMedia(false);
135
136  if (command_line.HasSwitch(switches::kEnableWebAnimationsSVG))
137    WebRuntimeFeatures::enableWebAnimationsSVG(true);
138
139  if (command_line.HasSwitch(switches::kEnableWebMIDI))
140    WebRuntimeFeatures::enableWebMIDI(true);
141
142  if (command_line.HasSwitch(switches::kDisableFileSystem))
143    WebRuntimeFeatures::enableFileSystem(false);
144
145  if (command_line.HasSwitch(switches::kEnableExperimentalCanvasFeatures))
146    WebRuntimeFeatures::enableExperimentalCanvasFeatures(true);
147
148  if (command_line.HasSwitch(switches::kEnableDisplayList2dCanvas))
149    WebRuntimeFeatures::enableDisplayList2dCanvas(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::kEnableTargetedStyleRecalc))
164    WebRuntimeFeatures::enableTargetedStyleRecalc(true);
165
166  if (command_line.HasSwitch(switches::kEnableBleedingEdgeRenderingFastPaths))
167    WebRuntimeFeatures::enableBleedingEdgeFastPaths(true);
168
169  if (command_line.HasSwitch(switches::kEnablePreciseMemoryInfo))
170    WebRuntimeFeatures::enablePreciseMemoryInfo(true);
171
172  if (command_line.HasSwitch(switches::kEnableLayerSquashing))
173    WebRuntimeFeatures::enableLayerSquashing(true);
174
175  if (command_line.HasSwitch(switches::kEnableNetworkInformation) ||
176      command_line.HasSwitch(
177          switches::kEnableExperimentalWebPlatformFeatures)) {
178    WebRuntimeFeatures::enableNetworkInformation(true);
179  }
180}
181
182}  // namespace content
183