IDL: Put generated union type containers in separate files

Source/bindings/tests/results/core/StringOrDouble.cpp

+// 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!
+
+#include "config.h"
+#include "StringOrDouble.h"
+
+
+namespace blink {
+
+StringOrDouble::StringOrDouble()
+    : m_type(SpecificTypeNone)
+{
+}
+
+String StringOrDouble::getAsString() const
+{
+    ASSERT(isString());
+    return m_string;
+}
+
+void StringOrDouble::setString(String value)
+{
+    ASSERT(isNull());
+    m_string = value;
+    m_type = SpecificTypeString;
+}
+
+StringOrDouble StringOrDouble::fromString(String value)
+{
+    StringOrDouble container;
+    container.setString(value);
+    return container;
+}
+
+double StringOrDouble::getAsDouble() const
+{
+    ASSERT(isDouble());
+    return m_double;
+}
+
+void StringOrDouble::setDouble(double value)
+{
+    ASSERT(isNull());
+    m_double = value;
+    m_type = SpecificTypeDouble;
+}
+
+StringOrDouble StringOrDouble::fromDouble(double value)
+{
+    StringOrDouble container;
+    container.setDouble(value);
+    return container;
+}
+
+void V8StringOrDouble::toImpl(v8::Isolate* isolate, v8::Local<v8::Value> v8Value, StringOrDouble& impl, ExceptionState& exceptionState)
+{
+    if (v8Value.IsEmpty())
+        return;
+
+    if (v8Value->IsNumber()) {
+        TONATIVE_VOID_EXCEPTIONSTATE(double, cppValue, toRestrictedDouble(v8Value, exceptionState), exceptionState);
+        impl.setDouble(cppValue);
+        return;
+    }
+
+    {
+        TOSTRING_VOID_EXCEPTIONSTATE(V8StringResource<>, cppValue, v8Value, exceptionState);
+        impl.setString(cppValue);
+        return;
+    }
+
+}
+
+v8::Local<v8::Value> toV8(const StringOrDouble& impl, v8::Local<v8::Object> creationContext, v8::Isolate* isolate)
+{
+    switch (impl.m_type) {
+    case StringOrDouble::SpecificTypeNone:
+        return v8::Null(isolate);
+    case StringOrDouble::SpecificTypeString:
+        return v8String(isolate, impl.getAsString());
+    case StringOrDouble::SpecificTypeDouble:
+        return v8::Number::New(isolate, impl.getAsDouble());
+    default:
+        ASSERT_NOT_REACHED();
+    }
+    return v8::Local<v8::Value>();
+}
+
+StringOrDouble NativeValueTraits<StringOrDouble>::nativeValue(const v8::Local<v8::Value>& value, v8::Isolate* isolate, ExceptionState& exceptionState)
+{
+    StringOrDouble impl;
+    V8StringOrDouble::toImpl(isolate, value, impl, exceptionState);
+    return impl;
+}
+
+} // namespace blink