bindings: Supports serializer for PerformanceTiming.

Source/core/timing/PerformanceTiming.h

 /*
  * Copyright (C) 2010 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/frame/DOMWindowProperty.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class DocumentLoadTiming;
 class DocumentLoader;
 class DocumentTiming;
 class LocalFrame;
 class ResourceLoadTiming;
+class ScriptState;
+class ScriptValue;
 
 class CORE_EXPORT PerformanceTiming final : public GarbageCollectedFinalized<PerformanceTiming>, public ScriptWrappable, public DOMWindowProperty {
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(PerformanceTiming);
 public:
     static PerformanceTiming* create(LocalFrame* frame)
     {
         return new PerformanceTiming(frame);
     }
 
@@ skipping 12 matching lines @@
     unsigned long long responseStart() const;
     unsigned long long responseEnd() const;
     unsigned long long domLoading() const;
     unsigned long long domInteractive() const;
     unsigned long long domContentLoadedEventStart() const;
     unsigned long long domContentLoadedEventEnd() const;
     unsigned long long domComplete() const;
     unsigned long long loadEventStart() const;
     unsigned long long loadEventEnd() const;
 
+    ScriptValue toJSONForBinding(ScriptState*);
+
     DECLARE_VIRTUAL_TRACE();
 
     unsigned long long monotonicTimeToIntegerMilliseconds(double) const;
     double integerMillisecondsToMonotonicTime(unsigned long long) const;
 
 private:
     explicit PerformanceTiming(LocalFrame*);
 
     const DocumentTiming* documentTiming() const;
     DocumentLoader* documentLoader() const;
     DocumentLoadTiming* documentLoadTiming() const;
     ResourceLoadTiming* resourceLoadTiming() const;
 };
 
 } // namespace blink
 
 #endif // PerformanceTiming_h