Refactoring BufferedDataSource to work with WebURLLoader instead of a MediaResourceLoaderBridge.

webkit/glue/multipart_response_delegate.h

Index: webkit/glue/multipart_response_delegate.h
diff --git a/webkit/glue/multipart_response_delegate.h b/webkit/glue/multipart_response_delegate.h
index aded54a397ea402704ca18d3946e3bfd83fcb45f..050098340bef1940966626acbacc6a8e284d50cb 100644
--- a/webkit/glue/multipart_response_delegate.h
+++ b/webkit/glue/multipart_response_delegate.h
@@ -92,7 +92,8 @@ class MultipartResponseDelegate {
   // Returns true on success.
   static bool ReadContentRanges(const WebKit::WebURLResponse& response,
                                 int* content_range_lower_bound,
-                                int* content_range_upper_bound);
+                                int* content_range_upper_bound,
+                                int* content_range_instance_size);
 
  private:
   friend class MultipartResponseDelegateTester;  // For unittests.