Merge 76437 - 2011-01-22 Adrienne Walker <enne@google.com>...

Source/WebCore/platform/graphics/chromium/LayerRendererChromium.cpp

 /*
  * Copyright (C) 2010 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 137 matching lines @@
 }
 
 IntRect LayerRendererChromium::horizontalScrollbarRect(const IntRect& visibleRect, const IntRect& contentRect)
 {
     IntRect horizontalScrollbar(IntPoint(contentRect.x(), contentRect.bottom()), IntSize(visibleRect.width(), visibleRect.height() - contentRect.height()));
     return horizontalScrollbar;
 }
 
 void LayerRendererChromium::invalidateRootLayerRect(const IntRect& dirtyRect, const IntRect& visibleRect, const IntRect& contentRect)
 {
-    if (contentRect.intersects(dirtyRect))
-        m_rootLayerTiler->invalidateRect(dirtyRect);
+    m_rootLayerTiler->invalidateRect(dirtyRect);
     if (m_horizontalScrollbarTiler) {
         IntRect scrollbar = horizontalScrollbarRect(visibleRect, contentRect);
         if (dirtyRect.intersects(scrollbar)) {
             m_horizontalScrollbarTiler->setLayerPosition(scrollbar.location());
             m_horizontalScrollbarTiler->invalidateRect(dirtyRect);
         }
     }
     if (m_verticalScrollbarTiler) {
         IntRect scrollbar = verticalScrollbarRect(visibleRect, contentRect);
         if (dirtyRect.intersects(scrollbar)) {
@@ skipping 631 matching lines @@
     m_rootLayerTiler.clear();
     m_horizontalScrollbarTiler.clear();
     m_verticalScrollbarTiler.clear();
 
     m_textureManager.clear();
 }
 
 } // namespace WebCore
 
 #endif // USE(ACCELERATED_COMPOSITING)