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

media/blink/buffered_resource_loader.cc

Index: media/blink/buffered_resource_loader.cc
diff --git a/media/blink/buffered_resource_loader.cc b/media/blink/buffered_resource_loader.cc
index 51ec8fe99e3fe1c4ff92c6558ffbfe79cce6058e..ce03bbed4b4c1acb1ae764f4448a9aa8c8cd41fe 100644
--- a/media/blink/buffered_resource_loader.cc
+++ b/media/blink/buffered_resource_loader.cc
@@ -363,6 +363,9 @@ void BufferedResourceLoader::didReceiveResponse(
                "Unknown")
            << " " << response.httpStatusCode();
   DCHECK(active_loader_.get());
+  response_original_url_ = response.wasFetchedViaServiceWorker()
+                               ? response.originalURLViaServiceWorker()
+                               : response.url();
 
   // The loader may have been stopped and |start_cb| is destroyed.
   // In this case we shouldn't do anything.