[v8 gc] Introduce a base class for all objects that can have pending activity

third_party/WebKit/Source/modules/websockets/DOMWebSocket.h

Index: third_party/WebKit/Source/modules/websockets/DOMWebSocket.h
diff --git a/third_party/WebKit/Source/modules/websockets/DOMWebSocket.h b/third_party/WebKit/Source/modules/websockets/DOMWebSocket.h
index 6a27148541cdf77feef7ced9355122935b3da9e7..b5a16ab6dccdb653aff6cfd0ac1e8a2cf42a8905 100644
--- a/third_party/WebKit/Source/modules/websockets/DOMWebSocket.h
+++ b/third_party/WebKit/Source/modules/websockets/DOMWebSocket.h
@@ -32,6 +32,7 @@
 #define DOMWebSocket_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
+#include "bindings/core/v8/V8GCRoot.h"
 #include "core/dom/ActiveDOMObject.h"
 #include "core/events/EventListener.h"
 #include "core/events/EventTarget.h"
@@ -58,7 +59,7 @@ class ExceptionState;
 class ExecutionContext;
 class StringOrStringSequence;
 
-class MODULES_EXPORT DOMWebSocket : public RefCountedGarbageCollectedEventTargetWithInlineData<DOMWebSocket>, public ActiveDOMObject, public WebSocketChannelClient {
+class MODULES_EXPORT DOMWebSocket : public RefCountedGarbageCollectedEventTargetWithInlineData<DOMWebSocket>, public ActiveDOMObject, public WebSocketChannelClient, public V8GCRoot {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(DOMWebSocket);
     DEFINE_WRAPPERTYPEINFO();
     USING_GARBAGE_COLLECTED_MIXIN(DOMWebSocket);