IDL: For DOMString? attribute getters, use null string to represent null

Source/bindings/tests/results/V8TestObject.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 "V8TestObject.h"
 
 #include "bindings/core/v8/V8HTMLCollection.h"
@@ skipping 1502 matching lines @@
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMSetter");
     TestObjectV8Internal::floatArrayAttributeAttributeSetter(v8Value, info);
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 static void stringOrNullAttributeAttributeGetter(const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     v8::Handle<v8::Object> holder = info.Holder();
     TestObject* impl = V8TestObject::toNative(holder);
-    bool isNull = false;
-    String cppValue(impl->stringOrNullAttribute(isNull));
-    if (isNull) {
+    String cppValue(impl->stringOrNullAttribute());

[Jens Widell, 2014/06/30 10:43:41]

For reference, this change is identical to the change in CG for
NavigatorLanguage.language and MouseEventHitRegion.region. (And that's the only
way CG changes.)

+    if (!cppValue) {
         v8SetReturnValueNull(info);
         return;
     }
     v8SetReturnValueString(info, cppValue, info.GetIsolate());
 }
 
 static void stringOrNullAttributeAttributeGetterCallback(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
 {
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMGetter");
     TestObjectV8Internal::stringOrNullAttributeAttributeGetter(info);
@@ skipping 8658 matching lines @@
     fromInternalPointer(object)->deref();
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestObject* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace WebCore