Web Speech API: Don't expose the API on Android

The API is not implemented on Android yet.

BUG=170079
TBR=jamesr

Review URL: https://chromiumcodereview.appspot.com/11970005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@177134 0039d316-1c4b-4281-b951-d872f2087c98

content/renderer/render_thread_impl.cc

@@ -692,7 +692,12 @@ void RenderThreadImpl::EnsureWebKitInitialized() {
   WebRuntimeFeatures::enableSpeechInput(
       !command_line.HasSwitch(switches::kDisableSpeechInput));
 
+#if defined(OS_ANDROID)
+  // Web Speech API Speech recognition is not implemented on Android yet.
+  WebRuntimeFeatures::enableScriptedSpeech(false);
+#else
   WebRuntimeFeatures::enableScriptedSpeech(true);
+#endif
 
   WebRuntimeFeatures::enableFileSystem(
       !command_line.HasSwitch(switches::kDisableFileSystem));