Remove TiledBacking / TileCache code

Source/WebCore/history/CachedFrame.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 96 matching lines @@
 
     frame->animation()->resumeAnimationsForDocument(m_document.get());
     frame->eventHandler()->setMousePressNode(m_mousePressNode.get());
     m_document->resumeActiveDOMObjects();
     m_document->resumeScriptedAnimationControllerCallbacks();
 
     // It is necessary to update any platform script objects after restoring the
     // cached page.
     frame->script()->updatePlatformScriptObjects();
 
-#if USE(ACCELERATED_COMPOSITING)
-    if (m_isComposited)
-        frame->view()->restoreBackingStores();
-#endif
-
     frame->loader()->client()->didRestoreFromPageCache();
 
     // Reconstruct the FrameTree
     for (unsigned i = 0; i < m_childFrames.size(); ++i)
         frame->tree()->appendChild(m_childFrames[i]->view()->frame());
 
     // Open the child CachedFrames in their respective FrameLoaders.
     for (unsigned i = 0; i < m_childFrames.size(); ++i)
         m_childFrames[i]->open();
 
@@ skipping 39 matching lines @@
     // those create more objects.
     m_document->documentWillSuspendForPageCache();
     m_document->suspendScriptedAnimationControllerCallbacks();
     m_document->suspendActiveDOMObjects(ActiveDOMObject::DocumentWillBecomeInactive);
     m_cachedFrameScriptData = adoptPtr(new ScriptCachedFrameData(frame));
 
     m_document->domWindow()->suspendForPageCache();
 
     frame->loader()->client()->savePlatformDataToCachedFrame(this);
 
-#if USE(ACCELERATED_COMPOSITING)
-    if (m_isComposited && pageCache()->shouldClearBackingStores())
-        frame->view()->clearBackingStores();
-#endif
-
     // documentWillSuspendForPageCache() can set up a layout timer on the FrameView, so clear timers after that.
     frame->clearTimers();
 
     // Deconstruct the FrameTree, to restore it later.
     // We do this for two reasons:
     // 1 - We reuse the main frame, so when it navigates to a new page load it needs to start with a blank FrameTree.
     // 2 - It's much easier to destroy a CachedFrame while it resides in the PageCache if it is disconnected from its parent.
     for (unsigned i = 0; i < m_childFrames.size(); ++i)
         frame->tree()->removeChild(m_childFrames[i]->view()->frame());
 
@@ skipping 95 matching lines @@
 int CachedFrame::descendantFrameCount() const
 {
     int count = m_childFrames.size();
     for (size_t i = 0; i < m_childFrames.size(); ++i)
         count += m_childFrames[i]->descendantFrameCount();
     
     return count;
 }
 
 } // namespace WebCore