[bindings] Pass v8::Local<v8::Value> by value in NativeValueTraits<T>::nativeValue()

Source/bindings/core/v8/Dictionary.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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 114 matching lines @@
     bool getKey(const String& key, v8::Local<v8::Value>&) const;
 
 private:
     v8::Handle<v8::Value> m_options;
     v8::Isolate* m_isolate;
     ExceptionState* m_exceptionState;
 };
 
 template<>
 struct NativeValueTraits<Dictionary> {
-    static inline Dictionary nativeValue(const v8::Handle<v8::Value>& value, v8::Isolate* isolate, ExceptionState& exceptionState)
+    static inline Dictionary nativeValue(v8::Handle<v8::Value> value, v8::Isolate* isolate, ExceptionState& exceptionState)
     {
         return Dictionary(value, isolate, exceptionState);
     }
 };
 
 // DictionaryHelper is a collection of static methods for getting or
 // converting a value from Dictionary.
 struct DictionaryHelper {
     template <typename T>
     static bool get(const Dictionary&, const String& key, T& value);
@@ skipping 15 matching lines @@
     static bool convert(const Dictionary&, Dictionary::ConversionContext&, const String& key, T& value);
     template <typename T>
     static bool convert(const Dictionary&, Dictionary::ConversionContext&, const String& key, Nullable<T>& value);
     template <template <typename> class PointerType, typename T>
     static bool convert(const Dictionary&, Dictionary::ConversionContext&, const String& key, PointerType<T>& value);
 };
 
 }
 
 #endif // Dictionary_h