Adding callback support to media filter Initialize() and Seek().

webkit/glue/media/simple_data_source.h

 // Copyright (c) 2009 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.
 
 // An extremely simple implementation of DataSource that downloads the entire
 // media resource into memory before signaling that initialization has finished.
 // Primarily used to test <audio> and <video> with buffering/caching removed
 // from the equation.
 
 #ifndef WEBKIT_GLUE_MEDIA_SIMPLE_DATA_SOURCE_H_
@@ skipping 20 matching lines @@
         SimpleDataSource,
         MessageLoop*,
         webkit_glue::MediaResourceLoaderBridgeFactory*>(message_loop,
                                                         bridge_factory);
   }
 
   // MediaFilter implementation.
   virtual void Stop();
 
   // DataSource implementation.
-  virtual bool Initialize(const std::string& url);
+  virtual void Initialize(const std::string& url,
+                          media::FilterCallback* callback);
   virtual const media::MediaFormat& media_format();
   virtual size_t Read(uint8* data, size_t size);
   virtual bool GetPosition(int64* position_out);
   virtual bool SetPosition(int64 position);
   virtual bool GetSize(int64* size_out);
   virtual bool IsSeekable();
 
   // webkit_glue::ResourceLoaderBridge::Peer implementation.
   virtual void OnDownloadProgress(uint64 position, uint64 size);
   virtual void OnUploadProgress(uint64 position, uint64 size);
@@ skipping 45 matching lines @@
     UNINITIALIZED,
     INITIALIZING,
     INITIALIZED,
     STOPPED,
   };
   State state_;
 
   // Used for accessing |state_|.
   Lock lock_;
 
+  // Filter callbacks.
+  scoped_ptr<media::FilterCallback> initialize_callback_;
+
   DISALLOW_COPY_AND_ASSIGN(SimpleDataSource);
 };
 
 }  // namespace webkit_glue
 
 #endif  // WEBKIT_GLUE_MEDIA_SIMPLE_DATA_SOURCE_H_