Remove TiledBacking / TileCache code

Source/WebCore/history/CachedFrame.cpp

Index: Source/WebCore/history/CachedFrame.cpp
diff --git a/Source/WebCore/history/CachedFrame.cpp b/Source/WebCore/history/CachedFrame.cpp
index bac63720bbeed2e05c63cdac2ecb5a176c3e7f58..6ad956ae2e44a880f38a341057b47d1498510208 100644
--- a/Source/WebCore/history/CachedFrame.cpp
+++ b/Source/WebCore/history/CachedFrame.cpp
@@ -114,11 +114,6 @@ void CachedFrameBase::restore()
     // cached page.
     frame->script()->updatePlatformScriptObjects();
 
-#if USE(ACCELERATED_COMPOSITING)
-    if (m_isComposited)
-        frame->view()->restoreBackingStores();
-#endif
-
     frame->loader()->client()->didRestoreFromPageCache();
 
     // Reconstruct the FrameTree
@@ -178,11 +173,6 @@ CachedFrame::CachedFrame(Frame* frame)
 
     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();