Add V8ObjectBuilder helper and use in modules/crypto/

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 36 matching lines @@
 // because they hold a V8 value without putting it on persistent handles.
 class CORE_EXPORT Dictionary {
     ALLOW_ONLY_INLINE_ALLOCATION();
 public:
     Dictionary();
     Dictionary(const v8::Handle<v8::Value>& options, v8::Isolate*, ExceptionState&);
     ~Dictionary();
 
     Dictionary& operator=(const Dictionary&);
 
-    // This is different from the default constructor:
-    //   * isObject() is true when using createEmpty().
-    //   * isUndefinedOrNull() is true when using default constructor.
-    static Dictionary createEmpty(v8::Isolate*);
-
     bool isObject() const;
     bool isUndefinedOrNull() const;
 
     bool get(const String&, Dictionary&) const;
     bool get(const String&, v8::Local<v8::Value>&) const;
 
-    // Sets properties using default attributes.
-    bool set(const String&, const v8::Handle<v8::Value>&);
-    bool set(const String&, const String&);
-    bool set(const String&, unsigned);
-    bool set(const String&, const Dictionary&);
-
     v8::Handle<v8::Value> v8Value() const { return m_options; }
 
     class CORE_EXPORT ConversionContext {
     public:
         explicit ConversionContext(ExceptionState& exceptionState)
             : m_exceptionState(exceptionState)
             , m_dirty(true)
         {
             resetPerPropertyContext();
         }
@@ skipping 83 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