Monitor VideoResourceUpdater reusing destructed resource in Debug mode.

cc/resources/video_resource_updater.h

Index: cc/resources/video_resource_updater.h
diff --git a/cc/resources/video_resource_updater.h b/cc/resources/video_resource_updater.h
index 4e11110a01ca1eb89894fe5c775493d0972781f1..bc47b4dae482780db8727ab92fd71a097e41b81f 100644
--- a/cc/resources/video_resource_updater.h
+++ b/cc/resources/video_resource_updater.h
@@ -111,7 +111,11 @@ class CC_EXPORT VideoResourceUpdater
                                            const media::VideoFrame* video_frame,
                                            size_t plane_index);
 
-  static void SetPlaneResourceUniqueId(const media::VideoFrame* video_frame,
+  // Side effect: Marks in the userdata of the VideoFrame to prevent reusing the
+  // resource in the case that the original VideoFrame is destroyed and a new
+  // VideoFrame is re-created with the same pointer and the timestamps are not
+  // correctly set by the client.
+  static void SetPlaneResourceUniqueId(media::VideoFrame* video_frame,
                                        size_t plane_index,
                                        PlaneResource* plane_resource);