ActiveScriptWrappable: GC wrappers in detached ExecutionContexts.

third_party/WebKit/Source/modules/mediastream/MediaStreamTrack.h

Index: third_party/WebKit/Source/modules/mediastream/MediaStreamTrack.h
diff --git a/third_party/WebKit/Source/modules/mediastream/MediaStreamTrack.h b/third_party/WebKit/Source/modules/mediastream/MediaStreamTrack.h
index 5bd5917c16acb4ebf5d13a978afa2adaaf289c87..15c60f104a9c1c322a11b713818b43a70c9787d8 100644
--- a/third_party/WebKit/Source/modules/mediastream/MediaStreamTrack.h
+++ b/third_party/WebKit/Source/modules/mediastream/MediaStreamTrack.h
@@ -44,10 +44,11 @@ class MediaTrackConstraints;
 class MediaStream;
 class MediaTrackSettings;
 
-class MODULES_EXPORT MediaStreamTrack : public EventTargetWithInlineData,
-                                        public ActiveScriptWrappable,
-                                        public SuspendableObject,
-                                        public MediaStreamSource::Observer {
+class MODULES_EXPORT MediaStreamTrack
+    : public EventTargetWithInlineData,
+      public ActiveScriptWrappable<MediaStreamTrack>,
+      public SuspendableObject,
+      public MediaStreamSource::Observer {
   USING_GARBAGE_COLLECTED_MIXIN(MediaStreamTrack);
   DEFINE_WRAPPERTYPEINFO();