IDL: Support default values for dictionary members of union types

Source/bindings/tests/results/modules/UnionTypesModules.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 UnionTypeModules_h
 #define UnionTypeModules_h
 
 #include "bindings/core/v8/Dictionary.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/UnionTypesCore.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 
 class BooleanOrString final {
     ALLOW_ONLY_INLINE_ALLOCATION();
 public:
     BooleanOrString();
     bool isNull() const { return m_type == SpecificTypeNone; }
 
     bool isBoolean() const { return m_type == SpecificTypeBoolean; }
     bool getAsBoolean() const;
     void setBoolean(bool);
+    static BooleanOrString fromBoolean(bool);
 
     bool isString() const { return m_type == SpecificTypeString; }
     String getAsString() const;
     void setString(String);
+    static BooleanOrString fromString(String);
 
 private:
     enum SpecificTypes {
         SpecificTypeNone,
         SpecificTypeBoolean,
         SpecificTypeString,
     };
     SpecificTypes m_type;
 
     bool m_boolean;
@@ skipping 16 matching lines @@
 }
 
 template <>
 struct NativeValueTraits<BooleanOrString> {
     static BooleanOrString nativeValue(const v8::Local<v8::Value>&, v8::Isolate*, ExceptionState&);
 };
 
 } // namespace blink
 
 #endif // UnionTypeModules_h