Enable audio/video tag in content_shell

content/public/common/content_paths.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_COMMON_CONTENT_PATHS_H_
 #define CONTENT_PUBLIC_COMMON_CONTENT_PATHS_H_
 #pragma once
 
 #include "content/common/content_export.h"
 
 // This file declares path keys for the content module.  These can be used with
 // the PathService to access various special directories and files.
 
 namespace content {
 
 enum {
   PATH_START = 4000,
 
   // Path and filename to the executable to use for child processes.
   CHILD_PROCESS_EXE = PATH_START,
 
   // Valid only in development environment
   DIR_TEST_DATA,
 
+  // Directory where the Media libraries reside.
+  DIR_MEDIA_LIBS,
+
   PATH_END
 };
 
 // Call once to register the provider for the path keys defined above.
 CONTENT_EXPORT void RegisterPathProvider();
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_CONTENT_PATHS_H_