disable web audio by default on android and add switches to enable it

content/public/common/content_switches.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/public/common/content_switches.h"
 
 namespace switches {
 
 // By default, file:// URIs cannot read other file:// URIs. This is an
 // override for developers who need the old behavior for testing.
@@ skipping 192 matching lines @@
 // TODO(primiano): Remove the two switches below when the URL becomes public.
 // Specifies the webservice URL for continuous speech recognition.
 const char kSpeechRecognitionWebserviceURL[] = "speech-service";
 
 // Specifies the request key for the continuous speech recognition webservice.
 const char kSpeechRecognitionWebserviceKey[] = "speech-service-key";
 
 // Disables animation on the compositor thread.
 const char kDisableThreadedAnimation[]      = "disable-threaded-animation";
 
+#if defined(OS_ANDROID)
+// Enable web audio API.
+const char kEnableWebAudio[]                = "enable-webaudio";
+#else
 // Disable web audio API.
 const char kDisableWebAudio[]               = "disable-webaudio";
+#endif
 
 // Don't enforce the same-origin policy. (Used by people testing their sites.)
 const char kDisableWebSecurity[]            = "disable-web-security";
 
 // Disable Web Sockets support.
 const char kDisableWebSockets[]             = "disable-web-sockets";
 
 // Disables WebKit's XSSAuditor. The XSSAuditor mitigates reflective XSS.
 const char kDisableXSSAuditor[]             = "disable-xss-auditor";
 
@@ skipping 441 matching lines @@
 const char kDefaultTileWidth[]              = "default-tile-width";
 const char kDefaultTileHeight[]             = "default-tile-height";
 
 // Sets the width and height above which a composited layer will get tiled.
 const char kMaxUntiledLayerWidth[]          = "max-untiled-layer-width";
 const char kMaxUntiledLayerHeight[]         = "max-untiled-layer-height";
 
 const char kFixedPositionCreatesStackingContext[]
     = "fixed-position-creates-stacking-context";
 }  // namespace switches