Add serializers for window.performance.

third_party/WebKit/Source/core/timing/MemoryInfo.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 20 matching lines @@
 #ifndef MemoryInfo_h
 #define MemoryInfo_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/CoreExport.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Allocator.h"
 
 namespace blink {
 
+class ScriptState;
+class ScriptValue;
+
 struct HeapInfo {
   DISALLOW_NEW();
   HeapInfo() : usedJSHeapSize(0), totalJSHeapSize(0), jsHeapSizeLimit(0) {}
 
   size_t usedJSHeapSize;
   size_t totalJSHeapSize;
   size_t jsHeapSizeLimit;
 };
 
 class CORE_EXPORT MemoryInfo final : public GarbageCollected<MemoryInfo>,
                                      public ScriptWrappable {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   static MemoryInfo* create() { return new MemoryInfo(); }
 
   size_t totalJSHeapSize() const { return m_info.totalJSHeapSize; }
   size_t usedJSHeapSize() const { return m_info.usedJSHeapSize; }
   size_t jsHeapSizeLimit() const { return m_info.jsHeapSizeLimit; }
 
+  ScriptValue toJSONForBinding(ScriptState*) const;
+
   DEFINE_INLINE_TRACE() {}
 
  private:
   MemoryInfo();
 
   HeapInfo m_info;
 };
 
 CORE_EXPORT size_t quantizeMemorySize(size_t);
 
 }  // namespace blink
 
 #endif  // MemoryInfo_h