ActiveScriptWrappable: GC wrappers in detached ExecutionContexts.

third_party/WebKit/Source/modules/eventsource/EventSource.h

Index: third_party/WebKit/Source/modules/eventsource/EventSource.h
diff --git a/third_party/WebKit/Source/modules/eventsource/EventSource.h b/third_party/WebKit/Source/modules/eventsource/EventSource.h
index cfdcea36c574f71af6b5abe709c9e9f9e797fd40..44e133b31b4474e9a124fcdf651f6a725174f197 100644
--- a/third_party/WebKit/Source/modules/eventsource/EventSource.h
+++ b/third_party/WebKit/Source/modules/eventsource/EventSource.h
@@ -51,11 +51,12 @@ class EventSourceInit;
 class ExceptionState;
 class ResourceResponse;
 
-class MODULES_EXPORT EventSource final : public EventTargetWithInlineData,
-                                         private ThreadableLoaderClient,
-                                         public ActiveScriptWrappable,
-                                         public SuspendableObject,
-                                         public EventSourceParser::Client {
+class MODULES_EXPORT EventSource final
+    : public EventTargetWithInlineData,
+      private ThreadableLoaderClient,
+      public ActiveScriptWrappable<EventSource>,
+      public SuspendableObject,
+      public EventSourceParser::Client {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(EventSource);