Store repaint rects in the coordinate space of their backing GraphicsLayer.

Source/core/rendering/LayoutRepainter.cpp

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2009 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
@@ skipping 26 matching lines @@
     , m_checkForRepaint(checkForRepaint)
 {
     if (RuntimeEnabledFeatures::repaintAfterLayoutEnabled())
         return;
 
     if (m_checkForRepaint) {
         m_repaintContainer = m_object.containerForRepaint();
         {
             // Hits in compositing/video/video-controls-layer-creation.html
             DisableCompositingQueryAsserts disabler;
-            m_oldBounds = m_object.clippedOverflowRectForRepaint(m_repaintContainer);
+            m_oldBounds = m_object.boundsRectForRepaint(m_repaintContainer);
             m_oldOffset = m_object.positionFromRepaintContainer(m_repaintContainer);
         }
     }
 }
 
 bool LayoutRepainter::repaintAfterLayout()
 {
+    fprintf(stderr, "LayoutRepainter::repaintAfterLayout\n");

[leviw_travelin_and_unemployed, 2014/05/29 20:49:00]

fprintf to ALL the stderrs!!

[chrishtr, 2014/05/29 21:06:11]

Done.

     if (RuntimeEnabledFeatures::repaintAfterLayoutEnabled())
         return false;
 
     // Hits in compositing/video/video-controls-layer-creation.html
     DisableCompositingQueryAsserts disabler;
 
     return m_checkForRepaint ? m_object.repaintAfterLayoutIfNeeded(m_repaintContainer, m_object.selfNeedsLayout(), m_oldBounds, m_oldOffset) : false;
 }
 
 } // namespace WebCore