Enable audio/video tag in content_shell

content/shell/shell_browser_context.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/shell/shell_browser_context.h"
 
 #include "base/bind.h"
 #include "base/environment.h"
 #include "base/file_util.h"
 #include "base/logging.h"
@@ skipping 156 matching lines @@
 
 net::URLRequestContextGetter*
     ShellBrowserContext::GetRequestContextForMedia()  {
   return GetRequestContext();
 }
 
 const ResourceContext& ShellBrowserContext::GetResourceContext()  {
   if (!resource_context_.get()) {
     resource_context_.reset(new ShellResourceContext(
         static_cast<ShellURLRequestContextGetter*>(GetRequestContext()),
-        GetBlobStorageContext()));
+        GetBlobStorageContext(), GetAudioManager()));
   }
   return *resource_context_.get();
 }
 
 HostZoomMap* ShellBrowserContext::GetHostZoomMap()  {
   if (!host_zoom_map_)
     host_zoom_map_ = HostZoomMap::Create();
   return host_zoom_map_.get();
 }
 
@@ skipping 78 matching lines @@
     BrowserThread::IO, FROM_HERE,
     base::Bind(
         &ChromeAppCacheService::InitializeOnIOThread,
         appcache_service_.get(),
         IsOffTheRecord()
             ? FilePath() : GetPath().Append(FILE_PATH_LITERAL("AppCache")),
         &GetResourceContext(),
         special_storage_policy));
 }
 
+AudioManager* ShellBrowserContext::GetAudioManager() {
+  if (!audio_manager_.get())
+    audio_manager_ = AudioManager::Create();
+  return audio_manager_;
+}
+
 }  // namespace content