Oilpan: remove unnecessary MultisamplingChangedObserver unregistration.

third_party/WebKit/Source/core/page/Page.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All Rights Reserved.
  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 371 matching lines @@
 bool Page::isCursorVisible() const
 {
     return m_isCursorVisible && settings().deviceSupportsMouse();
 }
 
 void Page::addMultisamplingChangedObserver(MultisamplingChangedObserver* observer)
 {
     m_multisamplingChangedObservers.add(observer);
 }
 
+// For Oilpan, unregistration is handled by the GC and weak references.
+#if !ENABLE(OILPAN)
 void Page::removeMultisamplingChangedObserver(MultisamplingChangedObserver* observer)
 {
     m_multisamplingChangedObservers.remove(observer);
 }
+#endif
 
 void Page::settingsChanged(SettingsDelegate::ChangeType changeType)
 {
     switch (changeType) {
     case SettingsDelegate::StyleChange:
         setNeedsRecalcStyleInAllFrames();
         break;
     case SettingsDelegate::ViewportDescriptionChange:
         if (mainFrame() && mainFrame()->isLocalFrame())
             deprecatedLocalMainFrame()->document()->updateViewportDescription();
@@ skipping 183 matching lines @@
 {
 }
 
 Page::PageClients::~PageClients()
 {
 }
 
 template class CORE_TEMPLATE_EXPORT WillBeHeapSupplement<Page>;
 
 } // namespace blink