IDL: Add build target for IDL dictionary impl generation in core

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/ScriptWrappable.h"
+#include "platform/heap/Handle.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+class TestingDictionary;
+
+class DictionaryTest : public GarbageCollectedFinalized<DictionaryTest>, public ScriptWrappable {
+public:
+    static DictionaryTest* create()
+    {
+        return new DictionaryTest();
+    }
+    virtual ~DictionaryTest();
+
+    // Stores all members into corresponding fields
+    void set(const TestingDictionary*);
+    // Creates a TestDictionary instnace from fields and returns it
+    TestingDictionary* get();
+
+    void trace(Visitor*);
+
+private:
+    DictionaryTest();
+
+    void reset();
+
+    // The reason to use Nullable<T> is convenience; we use Nullable<T> here to
+    // record whether the member field is set or not. |stringMember| isn't
+    // wrapped with Nullable because |stringMember| has a non-null default value
+    Nullable<unsigned> m_longMember;
+    String m_stringMember;
+    Nullable<bool> m_booleanOrNullMember;
+    Nullable<double> m_doubleOrNullMember;
+    Nullable<Vector<String> > m_stringSequenceMember;
+};
+
+} // namespace blink
+
+#endif // DictionaryTest_h