IDL: Null values should be converted for non-nullable dictionary members

Source/bindings/tests/results/core/TestDictionaryDerivedImplementedAs.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.
 
 // This file has been auto-generated by code_generator_v8.py. DO NOT MODIFY!
 
 #ifndef TestDictionaryDerivedImplementedAs_h
 #define TestDictionaryDerivedImplementedAs_h
 
 #include "bindings/tests/idls/core/TestDictionary.h"
 #include "platform/heap/Handle.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class TestDictionaryDerivedImplementedAs : public TestDictionary {
     ALLOW_ONLY_INLINE_ALLOCATION();
 public:
     TestDictionaryDerivedImplementedAs();
 
     bool hasDerivedStringMember() const { return !m_derivedStringMember.isNull(); }
     String derivedStringMember() const { return m_derivedStringMember; }
     void setDerivedStringMember(String value) { m_derivedStringMember = value; }
+    void resetDerivedStringMember() { m_derivedStringMember = String(); }
 
     bool hasDerivedStringMemberWithDefault() const { return !m_derivedStringMemberWithDefault.isNull(); }
     String derivedStringMemberWithDefault() const { return m_derivedStringMemberWithDefault; }
     void setDerivedStringMemberWithDefault(String value) { m_derivedStringMemberWithDefault = value; }
+    void resetDerivedStringMemberWithDefault() { m_derivedStringMemberWithDefault = String(); }
 
     virtual void trace(Visitor*);
 
 private:
     String m_derivedStringMember;
     String m_derivedStringMemberWithDefault;
 
     friend class V8TestDictionaryDerivedImplementedAs;
 };
 
 } // namespace blink
 
 #endif // TestDictionaryDerivedImplementedAs_h