[Merge to M45]Check the response URL origin in BufferedDataSource to avoid mixing cross-origin resp…

media/blink/buffered_resource_loader.h

Index: media/blink/buffered_resource_loader.h
diff --git a/media/blink/buffered_resource_loader.h b/media/blink/buffered_resource_loader.h
index cb0272063ec61f9ab7819ca0417a6102556c9c4f..6e466a37b0c80cea6b5c8802ab51e65d285c5f7a 100644
--- a/media/blink/buffered_resource_loader.h
+++ b/media/blink/buffered_resource_loader.h
@@ -205,6 +205,11 @@ class MEDIA_EXPORT BufferedResourceLoader
   // playback rate).
   void CancelUponDeferral();
 
+  // Returns the original URL of the response. If the request is redirected to
+  // another URL it is the URL after redirected. If the response is generated in
+  // a Service Worker it is empty.
+  const GURL response_original_url() const { return response_original_url_; }
+
  private:
   friend class BufferedDataSourceTest;
   friend class BufferedResourceLoaderTest;
@@ -316,6 +321,8 @@ class MEDIA_EXPORT BufferedResourceLoader
   // Playback rate of the media.
   double playback_rate_;
 
+  GURL response_original_url_;
+
   scoped_refptr<MediaLog> media_log_;
 
   bool cancel_upon_deferral_;