bindings: Support (deprecated) Dictionary in IDL dictionary

Source/core/testing/DictionaryTest.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef DictionaryTest_h
 #define DictionaryTest_h
 
 #include "bindings/core/v8/Nullable.h"
+#include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "bindings/core/v8/UnionTypesCore.h"
 #include "core/dom/Element.h"
 #include "platform/heap/Handle.h"
+#include "wtf/HashMap.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class InternalDictionary;
 class InternalDictionaryDerived;
 
 class DictionaryTest : public GarbageCollectedFinalized<DictionaryTest>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static DictionaryTest* create()
     {
         return new DictionaryTest();
     }
     virtual ~DictionaryTest();
 
     // Stores all members into corresponding fields
     void set(const InternalDictionary&);
     // Sets each member of the given TestDictionary from fields
     void get(InternalDictionary&);
+    // Returns properties of the latest |dictionaryMember| which was set via
+    // set().
+    ScriptValue getDictionaryMemberProperties(ScriptState*);
 
     void setDerived(const InternalDictionaryDerived&);
     void getDerived(InternalDictionaryDerived&);
 
     DECLARE_TRACE();
 
 private:
     DictionaryTest();
 
     void reset();
@@ skipping 26 matching lines @@
     RefPtrWillBeMember<Element> m_elementMember;
     RefPtrWillBeMember<Element> m_elementOrNullMember;
     ScriptValue m_objectMember;
     ScriptValue m_objectOrNullMemberWithDefault;
     DoubleOrString m_doubleOrStringMember;
     Nullable<HeapVector<DoubleOrString>> m_doubleOrStringSequenceMember;
     RefPtrWillBeMember<EventTarget> m_eventTargetOrNullMember;
     String m_derivedStringMember;
     String m_derivedStringMemberWithDefault;
     bool m_requiredBooleanMember;
+    Nullable<HashMap<String, String>> m_dictionaryMemberProperties;
 };
 
 } // namespace blink
 
 #endif // DictionaryTest_h