Adding flag for turning on the Media Source API

content/renderer/render_thread_impl.cc

 // Copyright (c) 2011 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/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 461 matching lines @@
       !command_line.HasSwitch(switches::kDisableLocalStorage));
   WebRuntimeFeatures::enableSessionStorage(
       !command_line.HasSwitch(switches::kDisableSessionStorage));
 
   WebRuntimeFeatures::enableIndexedDatabase(
       !command_line.HasSwitch(switches::kDisableIndexedDatabase));
 
   WebRuntimeFeatures::enableGeolocation(
       !command_line.HasSwitch(switches::kDisableGeolocation));
 
+  WebKit::WebRuntimeFeatures::enableMediaSource(
+      command_line.HasSwitch(switches::kEnableMediaSource));
+
   WebKit::WebRuntimeFeatures::enableMediaStream(
       command_line.HasSwitch(switches::kEnableMediaStream));
 
   WebKit::WebRuntimeFeatures::enableFullScreenAPI(
       !command_line.HasSwitch(switches::kDisableFullScreen));
 
   WebKit::WebRuntimeFeatures::enableVideoTrack(
       command_line.HasSwitch(switches::kEnableVideoTrack));
 
 #if defined(OS_CHROMEOS)
@@ skipping 283 matching lines @@
 
 scoped_refptr<base::MessageLoopProxy>
 RenderThreadImpl::GetFileThreadMessageLoopProxy() {
   DCHECK(message_loop() == MessageLoop::current());
   if (!file_thread_.get()) {
     file_thread_.reset(new base::Thread("Renderer::FILE"));
     file_thread_->Start();
   }
   return file_thread_->message_loop_proxy();
 }