Expose performance.memory in 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 25 matching lines @@
 #include "core/workers/WorkerGlobalScope.h"
 
 namespace WebCore {
 
 class DedicatedWorkerThread;
 struct WorkerThreadStartupData;
 
 class DedicatedWorkerGlobalScope : public WorkerGlobalScope {
 public:
     typedef WorkerGlobalScope Base;
-    static PassRefPtr<DedicatedWorkerGlobalScope> create(DedicatedWorkerThread*, PassOwnPtr<WorkerThreadStartupData>, double timeOrigin);
+    static PassRefPtr<DedicatedWorkerGlobalScope> create(DedicatedWorkerThread*, PassOwnPtr<WorkerThreadStartupData>, double timeOrigin, bool memoryInfoEnabled);

[abarth-chromium, 2014/01/07 06:59:16]

It's not correct to pass memoryInfoEnabled here.  We need to find a better way
to read settings on workers.  Do we have a WorkerSettings object?  Should we use
RuntimeEnabledFeatures?

[Pan, 2014/01/07 09:30:59]

Currently, workers don't have a WorkerSettings object. we can create one sit in
WorkerGlobalScope, memoryEnabled and other settings that needed could be there.
or do you mean dedicated worker should read settings of its document every time
in case it is changed?

     virtual ~DedicatedWorkerGlobalScope();
 
     virtual bool isDedicatedWorkerGlobalScope() const OVERRIDE { return true; }
 
     // 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();
 
 private:
-    DedicatedWorkerGlobalScope(const KURL&, const String& userAgent, DedicatedWorkerThread*, double timeOrigin, PassOwnPtr<WorkerClients>);
+    DedicatedWorkerGlobalScope(const KURL&, const String& userAgent, DedicatedWorkerThread*, double timeOrigin, bool memoryInfoEnabled, PassOwnPtr<WorkerClients>);
 };
 
 } // namespace WebCore
 
 #endif // DedicatedWorkerGlobalScope_h