Enable Media Source API by default.

content/renderer/render_thread_impl.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/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <vector>
@@ skipping 636 matching lines @@
       !command_line.HasSwitch(switches::kDisableLocalStorage));
   WebRuntimeFeatures::enableSessionStorage(
       !command_line.HasSwitch(switches::kDisableSessionStorage));
 
   WebRuntimeFeatures::enableIndexedDatabase(true);
 
   WebRuntimeFeatures::enableGeolocation(
       !command_line.HasSwitch(switches::kDisableGeolocation));
 
   WebKit::WebRuntimeFeatures::enableMediaSource(
-      command_line.HasSwitch(switches::kEnableMediaSource));
+      !command_line.HasSwitch(switches::kDisableMediaSource));
 
   WebRuntimeFeatures::enableMediaPlayer(
       media::IsMediaLibraryInitialized());
 
   WebKit::WebRuntimeFeatures::enableMediaStream(true);
   WebKit::WebRuntimeFeatures::enablePeerConnection(true);
 
   WebKit::WebRuntimeFeatures::enableFullScreenAPI(
       !command_line.HasSwitch(switches::kDisableFullScreen));
 
@@ skipping 476 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();
 }