Oilpan: Avoid declaring a destructor for garbage collected ListHashSet.

Source/core/html/forms/FormController.cpp

 /*
  * Copyright (C) 2006, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010, 2011, 2012 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 361 matching lines @@
     m_formToKeyMap.remove(form);
 }
 
 // ----------------------------------------------------------------------------
 
 PassRefPtrWillBeRawPtr<DocumentState> DocumentState::create()
 {
     return adoptRefWillBeNoop(new DocumentState);
 }
 
-DocumentState::~DocumentState()
-{
-}
+DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED()

[Erik Corry, 2014/05/09 07:46:03]

You didn't put the class name in the ().  Does this compile?

 
 void DocumentState::trace(Visitor* visitor)
 {
     visitor->trace(m_formControls);
 }
 
 void DocumentState::addControl(HTMLFormControlElementWithState* control)
 {
     ASSERT(!m_formControls.contains(control));
     m_formControls.add(control);
@@ skipping 155 matching lines @@
 {
     m_documentState->addControl(&control);
 }
 
 void FormController::unregisterStatefulFormControl(HTMLFormControlElementWithState& control)
 {
     m_documentState->removeControl(&control);
 }
 
 } // namespace WebCore