Fix mime type mappings when the unified media pipeline is enabled.

media/base/media.h

 // 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.
 
 // Contains code that should be used for initializing, or querying the state
 // of the media library as a whole.
 
 #ifndef MEDIA_BASE_MEDIA_H_
 #define MEDIA_BASE_MEDIA_H_
 
+#include "build/build_config.h"
 #include "media/base/media_export.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace media {
 
 // Initializes media libraries (e.g. ffmpeg) as well as CPU specific media
 // features.
 MEDIA_EXPORT void InitializeMediaLibrary();
 
+#if defined(OS_ANDROID)
+MEDIA_EXPORT bool IsUnifiedMediaPipelineEnabled();
+#endif
+
 }  // namespace media
 
 #endif  // MEDIA_BASE_MEDIA_H_