Make IDL Callbacks non-refcounted by default

Source/bindings/tests/results/V8TestCallback.h

Index: Source/bindings/tests/results/V8TestCallback.h
diff --git a/Source/bindings/tests/results/V8TestCallback.h b/Source/bindings/tests/results/V8TestCallback.h
index 66de71c0023298eb6ec003e6e3729755aeb915b7..5ce88d5b74d986b79f180286152033783a727107 100644
--- a/Source/bindings/tests/results/V8TestCallback.h
+++ b/Source/bindings/tests/results/V8TestCallback.h
@@ -44,11 +44,11 @@ class ExecutionContext;
 
 class V8TestCallback : public TestCallback, public ActiveDOMCallback {
 public:
-    static PassRefPtr<V8TestCallback> create(v8::Handle<v8::Value> jsValue, ExecutionContext* context)
+    static PassOwnPtr<V8TestCallback> create(v8::Handle<v8::Value> jsValue, ExecutionContext* context)
     {
         ASSERT(jsValue->IsObject());
         ASSERT(context);
-        return adoptRef(new V8TestCallback(v8::Handle<v8::Object>::Cast(jsValue), context));
+        return adoptPtr(new V8TestCallback(v8::Handle<v8::Object>::Cast(jsValue), context));
     }
 
     virtual ~V8TestCallback();