Add command line switch --enable-webrtc on Android.

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
===================================================================
--- content/renderer/render_thread_impl.cc	(revision 179784)
+++ content/renderer/render_thread_impl.cc	(working copy)
@@ -657,8 +657,15 @@
   WebRuntimeFeatures::enableMediaPlayer(
       media::IsMediaLibraryInitialized());
 
+#if defined(OS_ANDROID)
+  WebKit::WebRuntimeFeatures::enableMediaStream(
+      command_line.HasSwitch(switches::kEnableWebRTC));
+  WebKit::WebRuntimeFeatures::enablePeerConnection(
+      command_line.HasSwitch(switches::kEnableWebRTC));
+#else
   WebKit::WebRuntimeFeatures::enableMediaStream(true);
   WebKit::WebRuntimeFeatures::enablePeerConnection(true);
+#endif
 
   WebKit::WebRuntimeFeatures::enableFullScreenAPI(
       !command_line.HasSwitch(switches::kDisableFullScreen));
@@ -1096,6 +1103,12 @@
 
 WebKit::WebMediaStreamCenter* RenderThreadImpl::CreateMediaStreamCenter(
     WebKit::WebMediaStreamCenterClient* client) {
+#if defined(OS_ANDROID)
+  if (!CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableWebRTC))
+    return NULL;
+#endif
+
 #if defined(ENABLE_WEBRTC)
   if (!media_stream_center_)
     media_stream_center_ = new MediaStreamCenter(