Oilpan: Move WorkerClients to the managed heap and trace its supplements.

Source/modules/serviceworkers/ServiceWorkerContainerClient.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ServiceWorkerContainerClient_h
 #define ServiceWorkerContainerClient_h
 
 #include "core/dom/DocumentSupplementable.h"
 #include "core/workers/WorkerClients.h"
 #include "wtf/Forward.h"
@@ skipping 14 matching lines @@
     WTF_MAKE_NONCOPYABLE(ServiceWorkerContainerClient);
 public:
     static PassOwnPtr<ServiceWorkerContainerClient> create(PassOwnPtr<blink::WebServiceWorkerProvider>);
     virtual ~ServiceWorkerContainerClient();
 
     blink::WebServiceWorkerProvider* provider() { return m_provider.get(); }
 
     static const char* supplementName();
     static ServiceWorkerContainerClient* from(ExecutionContext*);
 
-    virtual void trace(Visitor*) OVERRIDE
-    {
-        // FIXME: Oilpan: Move WorkerClients to the managed heap before using this trace method.
-    }
+    virtual void trace(Visitor*) OVERRIDE { }
 
 protected:
     explicit ServiceWorkerContainerClient(PassOwnPtr<blink::WebServiceWorkerProvider>);
 
     OwnPtr<blink::WebServiceWorkerProvider> m_provider;
 };
 
 void provideServiceWorkerContainerClientToWorker(WorkerClients*, PassOwnPtr<blink::WebServiceWorkerProvider>);
 
 } // namespace WebCore
 
 #endif // ServiceWorkerContainerClient_h