MediaUrlInterceptor for embedders to handle custom urls.

media/base/android/media_resource_getter.h

 // Copyright (c) 2013 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 MEDIA_BASE_ANDROID_MEDIA_RESOURCE_GETTER_H_
 #define MEDIA_BASE_ANDROID_MEDIA_RESOURCE_GETTER_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 32 matching lines @@
   // Method for getting the cookies for a given URL.
   virtual void GetCookies(const GURL& url,
                           const GURL& first_party_for_cookies,
                           const GetCookieCB& callback) = 0;
 
   // Method for getting the platform path from a file system or blob URL.
   virtual void GetPlatformPathFromURL(
       const GURL& url,
       const GetPlatformPathCB& callback) = 0;
 
-  // Extract the metadata from a media URL. Once completed, the provided
+  // Extracts the metadata from a media URL. Once completed, the provided
   // callback function will be run.
   virtual void ExtractMediaMetadata(
       const std::string& url,
       const std::string& cookies,
       const std::string& user_agent,
       const ExtractMediaMetadataCB& callback) = 0;
+
+  // Extracts the metadata from a file descriptor. Once completed, the
+  // provided callback function will be run.
+  virtual void ExtractMediaMetadata(
+      const int fd,
+      const int64 offset,
+      const int64 size,
+      const ExtractMediaMetadataCB& callback) = 0;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_MEDIA_RESOURCE_GETTER_H_