Split BufferedResourceLoader's network callback into separate loading state and progress callbacks.

webkit/media/buffered_data_source.h

Index: webkit/media/buffered_data_source.h
diff --git a/webkit/media/buffered_data_source.h b/webkit/media/buffered_data_source.h
index fd97592154817c1d3b519cc86124c5a0fd03caba..5e1af54a764d38ea2f1b731af13c776a642f460a 100644
--- a/webkit/media/buffered_data_source.h
+++ b/webkit/media/buffered_data_source.h
@@ -129,11 +129,12 @@ class BufferedDataSource : public media::DataSource {
   // BufferedResourceLoader lives, i.e. render thread.
   void PartialReadStartCallback(BufferedResourceLoader::Status status);
 
-  // Callback method for making a read request to BufferedResourceLoader.
+  // Read callback for BufferedResourceLoader.
   void ReadCallback(BufferedResourceLoader::Status status, int bytes_read);
 
-  // Callback method when a network event is received.
-  void NetworkEventCallback();
+  // Loading and progress callbacks for HTTP resources.
+  void HttpLoadingCallback(BufferedResourceLoader::LoadingState state);
+  void HttpProgressCallback(int64 position);
 
   void UpdateHostState_Locked();