Remove custom left overs from object grouping

third_party/WebKit/Source/bindings/modules/v8/custom/V8IDBObserverCustom.cpp

 // Copyright 2016 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.
 
 #include "bindings/modules/v8/V8IDBObserver.h"
 
 #include "bindings/core/v8/ExceptionMessages.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "bindings/core/v8/V8DOMWrapper.h"
@@ skipping 32 matching lines @@
 
   ScriptState* scriptState = ScriptState::forReceiverObject(info);
   v8::Local<v8::Function> v8Callback = v8::Local<v8::Function>::Cast(info[0]);
   IDBObserverCallback* callback =
       IDBObserverCallback::create(scriptState, v8Callback);
   IDBObserver* observer = IDBObserver::create(callback);
   if (exceptionState.hadException())
     return;
   DCHECK(observer);
   // TODO(bashi): Don't set private property (and remove this custom
-  // constructor) when we can call setWrapperReference() correctly.
+  // constructor) when we can trace correctly.
   V8PrivateProperty::getIDBObserverCallback(info.GetIsolate())
       .set(info.GetIsolate()->GetCurrentContext(), wrapper, v8Callback);
   v8SetReturnValue(info,
                    V8DOMWrapper::associateObjectWithWrapper(
                        info.GetIsolate(), observer, &wrapperTypeInfo, wrapper));
 }
 
 }  // namespace blink