IDL: Put generated union type containers in separate files

Source/bindings/tests/results/modules/BooleanOrString.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2015 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
+#ifndef BooleanOrString_h
+#define BooleanOrString_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);
@@ skipping 30 matching lines @@
     v8SetReturnValue(callbackInfo, toV8(impl, callbackInfo.Holder(), callbackInfo.GetIsolate()));
 }
 
 template <>
 struct NativeValueTraits<BooleanOrString> {
     static BooleanOrString nativeValue(const v8::Local<v8::Value>&, v8::Isolate*, ExceptionState&);
 };
 
 } // namespace blink
 
-#endif // UnionTypeModules_h
+#endif // BooleanOrString_h