IDL: reuse more code between CG for methods and constructors

Source/bindings/tests/results/V8TestInterfaceNamedConstructor2.cpp

 // 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!
 
 #include "config.h"
 #include "V8TestInterfaceNamedConstructor2.h"
 
 #include "RuntimeEnabledFeatures.h"
@@ skipping 42 matching lines @@
     if (!info.IsConstructCall()) {
         throwTypeError(ExceptionMessages::constructorNotCallableAsFunction("Audio"), isolate);
         return;
     }
 
     if (ConstructorMode::current(isolate) == ConstructorMode::WrapExistingObject) {
         v8SetReturnValue(info, info.Holder());
         return;
     }
 
-    Document* document = currentDOMWindow(isolate)->document();
-    ASSERT(document);
+    Document* documentPtr = currentDOMWindow(isolate)->document();
+    ASSERT(documentPtr);
+    Document& document = *documentPtr;
 
     // Make sure the document is added to the DOM Node map. Otherwise, the TestInterfaceNamedConstructor2 instance
     // may end up being the only node in the map and get garbage-collected prematurely.
-    toV8(document, info.Holder(), isolate);
+    toV8(documentPtr, info.Holder(), isolate);
 
     if (UNLIKELY(info.Length() < 1)) {
         throwMinimumArityTypeErrorForConstructor("TestInterfaceNamedConstructor2", 1, info.Length(), info.GetIsolate());
         return;
     }
     V8StringResource<> stringArg;
     {
         TOSTRING_VOID_INTERNAL(stringArg, info[0]);
     }
-    RefPtr<TestInterfaceNamedConstructor2> impl = TestInterfaceNamedConstructor2::createForJSConstructor(*document, stringArg);
+    RefPtr<TestInterfaceNamedConstructor2> impl = TestInterfaceNamedConstructor2::createForJSConstructor(stringArg);
 
     v8::Handle<v8::Object> wrapper = info.Holder();
     V8DOMWrapper::associateObjectWithWrapper<V8TestInterfaceNamedConstructor2>(impl.release(), &V8TestInterfaceNamedConstructor2Constructor::wrapperTypeInfo, wrapper, isolate, WrapperConfiguration::Independent);
     v8SetReturnValue(info, wrapper);
 }
 
 v8::Handle<v8::FunctionTemplate> V8TestInterfaceNamedConstructor2Constructor::domTemplate(v8::Isolate* isolate)
 {
     static int domTemplateKey; // This address is used for a key to look up the dom template.
     V8PerIsolateData* data = V8PerIsolateData::from(isolate);
@@ skipping 80 matching lines @@
     fromInternalPointer(object)->deref();
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestInterfaceNamedConstructor2* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace WebCore