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      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/public/common/content_switches.h"
      9 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
     10 
     11 #if defined(OS_ANDROID)
     12 #include <cpu-features.h>
     13 #include "base/android/build_info.h"
     14 #endif
     15 
     16 using WebKit::WebRuntimeFeatures;
     17 
     18 namespace content {
     19 
     20 static void SetRuntimeFeatureDefaultsForPlatform() {
     21 #if defined(OS_ANDROID)
     22 #if !defined(GOOGLE_TV)
     23   // MSE/EME implementation needs Android MediaCodec API that was introduced
     24   // in JellyBrean.
     25   if (base::android::BuildInfo::GetInstance()->sdk_int() < 16) {
     26     WebRuntimeFeatures::enableWebKitMediaSource(false);
     27     WebRuntimeFeatures::enableLegacyEncryptedMedia(false);
     28   }
     29 #endif  // !defined(GOOGLE_TV)
     30   bool enable_webaudio = false;
     31 #if defined(ARCH_CPU_ARMEL)
     32   // WebAudio needs Android MediaCodec API that was introduced in
     33   // JellyBean, and also currently needs NEON support for the FFT.
     34   enable_webaudio =
     35       (base::android::BuildInfo::GetInstance()->sdk_int() >= 16) &&
     36       ((android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0);
     37 #endif  // defined(ARCH_CPU_ARMEL)
     38   WebRuntimeFeatures::enableWebAudio(enable_webaudio);
     39   // Android does not support the Gamepad API.
     40   WebRuntimeFeatures::enableGamepad(false);
     41   // Android does not have support for PagePopup
     42   WebRuntimeFeatures::enablePagePopup(false);
     43   // datalist on Android is not enabled
     44   WebRuntimeFeatures::enableDataListElement(false);
     45 #endif  // defined(OS_ANDROID)
     46 }
     47 
     48 void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
     49     const CommandLine& command_line) {
     50   WebRuntimeFeatures::enableStableFeatures(true);
     51 
     52   if (command_line.HasSwitch(switches::kEnableExperimentalWebPlatformFeatures))
     53     WebRuntimeFeatures::enableExperimentalFeatures(true);
     54 
     55   SetRuntimeFeatureDefaultsForPlatform();
     56 
     57   if (command_line.HasSwitch(switches::kDisableDatabases))
     58     WebRuntimeFeatures::enableDatabase(false);
     59 
     60   if (command_line.HasSwitch(switches::kDisableApplicationCache))
     61     WebRuntimeFeatures::enableApplicationCache(false);
     62 
     63   if (command_line.HasSwitch(switches::kDisableDesktopNotifications))
     64     WebRuntimeFeatures::enableNotifications(false);
     65 
     66   if (command_line.HasSwitch(switches::kDisableLocalStorage))
     67     WebRuntimeFeatures::enableLocalStorage(false);
     68 
     69   if (command_line.HasSwitch(switches::kDisableSessionStorage))
     70     WebRuntimeFeatures::enableSessionStorage(false);
     71 
     72   if (command_line.HasSwitch(switches::kDisableGeolocation))
     73     WebRuntimeFeatures::enableGeolocation(false);
     74 
     75   if (command_line.HasSwitch(switches::kDisableWebKitMediaSource))
     76     WebRuntimeFeatures::enableWebKitMediaSource(false);
     77 
     78 #if defined(OS_ANDROID)
     79   if (command_line.HasSwitch(switches::kDisableWebRTC)) {
     80     WebRuntimeFeatures::enableMediaStream(false);
     81     WebRuntimeFeatures::enablePeerConnection(false);
     82   }
     83 
     84   if (!command_line.HasSwitch(switches::kEnableSpeechRecognition) ||
     85       !command_line.HasSwitch(
     86           switches::kEnableExperimentalWebPlatformFeatures)) {
     87     WebRuntimeFeatures::enableScriptedSpeech(false);
     88   }
     89 #endif
     90 
     91   if (command_line.HasSwitch(switches::kDisableWebAudio))
     92     WebRuntimeFeatures::enableWebAudio(false);
     93 
     94   if (command_line.HasSwitch(switches::kDisableFullScreen))
     95     WebRuntimeFeatures::enableFullscreen(false);
     96 
     97   if (command_line.HasSwitch(switches::kEnableEncryptedMedia))
     98     WebRuntimeFeatures::enableEncryptedMedia(true);
     99 
    100   if (command_line.HasSwitch(switches::kDisableLegacyEncryptedMedia))
    101     WebRuntimeFeatures::enableLegacyEncryptedMedia(false);
    102 
    103   if (command_line.HasSwitch(switches::kEnableWebAnimationsCSS))
    104     WebRuntimeFeatures::enableWebAnimationsCSS();
    105 
    106   if (command_line.HasSwitch(switches::kEnableWebAnimationsSVG))
    107     WebRuntimeFeatures::enableWebAnimationsSVG();
    108 
    109   if (command_line.HasSwitch(switches::kEnableWebMIDI))
    110     WebRuntimeFeatures::enableWebMIDI(true);
    111 
    112 #if defined(OS_ANDROID)
    113   // Enable Device Motion on Android by default.
    114   WebRuntimeFeatures::enableDeviceMotion(
    115       !command_line.HasSwitch(switches::kDisableDeviceMotion));
    116 #else
    117   if (command_line.HasSwitch(switches::kEnableDeviceMotion))
    118       WebRuntimeFeatures::enableDeviceMotion(true);
    119 #endif
    120 
    121   if (command_line.HasSwitch(switches::kDisableDeviceOrientation))
    122     WebRuntimeFeatures::enableDeviceOrientation(false);
    123 
    124   if (command_line.HasSwitch(switches::kDisableSpeechInput))
    125     WebRuntimeFeatures::enableSpeechInput(false);
    126 
    127   if (command_line.HasSwitch(switches::kDisableFileSystem))
    128     WebRuntimeFeatures::enableFileSystem(false);
    129 
    130   if (command_line.HasSwitch(switches::kEnableExperimentalCanvasFeatures))
    131     WebRuntimeFeatures::enableExperimentalCanvasFeatures(true);
    132 
    133   if (command_line.HasSwitch(switches::kEnableSpeechSynthesis))
    134     WebRuntimeFeatures::enableSpeechSynthesis(true);
    135 
    136   if (command_line.HasSwitch(switches::kEnableWebGLDraftExtensions))
    137     WebRuntimeFeatures::enableWebGLDraftExtensions(true);
    138 
    139   if (command_line.HasSwitch(switches::kEnableHTMLImports))
    140     WebRuntimeFeatures::enableHTMLImports(true);
    141 
    142   if (command_line.HasSwitch(switches::kEnableOverlayScrollbars))
    143     WebRuntimeFeatures::enableOverlayScrollbars(true);
    144 }
    145 
    146 }  // namespace content
    147