Check the response URL origin in BufferedDataSource to avoid mixing cross-origin responses.

media/blink/buffered_data_source.h

 // Copyright 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_BLINK_BUFFERED_DATA_SOURCE_H_
 #define MEDIA_BLINK_BUFFERED_DATA_SOURCE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 220 matching lines @@
   // Current playback rate.
   double playback_rate_;
 
   scoped_refptr<MediaLog> media_log_;
 
   // Host object to report buffered byte range changes to.
   BufferedDataSourceHost* host_;
 
   DownloadingCB downloading_cb_;
 
+  // The orinal URL of the first response. If the response is generated in the
+  // Service Worker this URL is empty. BufferedDataSource checks the orinal URL

[falken, 2015/07/02 01:04:08]

"original URL" (2 places)
"a Service Worker"

[horo, 2015/07/02 03:10:49]

Done.

+  // of the succeeding response. If it is different from the original URL of the

[falken, 2015/07/02 01:04:08]

"of each successive response"?

[horo, 2015/07/02 03:10:49]

Done.

+  // first response, it is treated as an error.
+  GURL response_original_url_;
+
   // Disallow rebinding WeakReference ownership to a different thread by keeping
   // a persistent reference. This avoids problems with the thread-safety of
   // reaching into this class from multiple threads to attain a WeakPtr.
   base::WeakPtr<BufferedDataSource> weak_ptr_;
   base::WeakPtrFactory<BufferedDataSource> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BufferedDataSource);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_BUFFERED_DATA_SOURCE_H_