Enable media stream layout test with content_shell.

content/public/renderer/content_renderer_client.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/renderer/content_renderer_client.h"
 
 namespace content {
 
 SkBitmap* ContentRendererClient::GetSadPluginBitmap() {
   return NULL;
@@ skipping 35 matching lines @@
     const webkit_media::WebMediaPlayerParams& params) {
   return NULL;
 }
 
 WebKit::WebMediaStreamCenter*
 ContentRendererClient::OverrideCreateWebMediaStreamCenter(
     WebKit::WebMediaStreamCenterClient* client) {
   return NULL;
 }
 
+WebKit::WebUserMediaClient*
+ContentRendererClient::OverrideUserMediaClient() {
+  return NULL;
+}
+
+webkit_media::MediaStreamClient*
+ContentRendererClient::OverrideMediaStreamClient() {
+  return NULL;
+}
+
 WebKit::WebRTCPeerConnectionHandler*
 ContentRendererClient::OverrideCreateWebRTCPeerConnectionHandler(
     WebKit::WebRTCPeerConnectionHandlerClient* client) {
   return NULL;
 }
 
 WebKit::WebClipboard* ContentRendererClient::OverrideWebClipboard() {
   return NULL;
 }
 
@@ skipping 85 matching lines @@
 
 MessageLoop* ContentRendererClient::OverrideCompositorMessageLoop() const {
   return NULL;
 }
 
 bool ContentRendererClient::ShouldCreateCompositorInputHandler() const {
   return true;
 }
 
 }  // namespace content