Support UseCounter in dedicated workers.

Source/core/workers/DedicatedWorkerGlobalScope.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 30 matching lines @@
 class DedicatedWorkerThread;
 class WorkerThreadStartupData;
 
 class DedicatedWorkerGlobalScope FINAL : public WorkerGlobalScope {
 public:
     typedef WorkerGlobalScope Base;
     static PassRefPtrWillBeRawPtr<DedicatedWorkerGlobalScope> create(DedicatedWorkerThread*, PassOwnPtrWillBeRawPtr<WorkerThreadStartupData>, double timeOrigin);
     virtual ~DedicatedWorkerGlobalScope();
 
     virtual bool isDedicatedWorkerGlobalScope() const OVERRIDE { return true; }
+    virtual void countFeature(UseCounter::Feature) const OVERRIDE;
+    virtual void countDeprecation(UseCounter::Feature) const OVERRIDE;
 
     // Overridden to allow us to check our pending activity after executing imported script.
     virtual void importScripts(const Vector<String>& urls, ExceptionState&) OVERRIDE;
 
     // EventTarget
     virtual const AtomicString& interfaceName() const OVERRIDE;
 
     void postMessage(PassRefPtr<SerializedScriptValue>, const MessagePortArray*, ExceptionState&);
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
 
-    DedicatedWorkerThread* thread();
+    DedicatedWorkerThread* thread() const;
 
     virtual void trace(Visitor*) OVERRIDE;
 
 private:
     DedicatedWorkerGlobalScope(const KURL&, const String& userAgent, DedicatedWorkerThread*, double timeOrigin, PassOwnPtrWillBeRawPtr<WorkerClients>);
 };
 
 } // namespace WebCore
 
 #endif // DedicatedWorkerGlobalScope_h