The cross-origin checks in the multibuffer code are not sufficient, as they only trigger when a red…

media/blink/multibuffer_data_source.cc

Index: media/blink/multibuffer_data_source.cc
diff --git a/media/blink/multibuffer_data_source.cc b/media/blink/multibuffer_data_source.cc
index 2045629d420faf4c443f7d0a74b3bc135665638d..a60c7614078d459c74ad41c401eed1eae27ea1c1 100644
--- a/media/blink/multibuffer_data_source.cc
+++ b/media/blink/multibuffer_data_source.cc
@@ -190,12 +190,10 @@ void MultibufferDataSource::OnRedirect(
           FROM_HERE,
           base::Bind(&MultibufferDataSource::StartCallback, weak_ptr_));
     } else {
-      {
-        base::AutoLock auto_lock(lock_);
-        StopInternal_Locked();
-      }
-      StopLoader();
+      base::AutoLock auto_lock(lock_);
+      StopInternal_Locked();
     }
+    StopLoader();
     return;
   }
   if (url_data_->url().GetOrigin() != destination->url().GetOrigin()) {