Revert of Separate repaint and layout requirements of StyleDifference (Step 1)

Source/core/rendering/svg/RenderSVGRoot.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007, 2008, 2009 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.
  * Copyright (C) Research In Motion Limited 2011. 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
  * License as published by the Free Software Foundation; either
@@ skipping 264 matching lines @@
 void RenderSVGRoot::willBeDestroyed()
 {
     RenderBlock::removePercentHeightDescendant(const_cast<RenderSVGRoot*>(this));
 
     SVGResourcesCache::clientDestroyed(this);
     RenderReplaced::willBeDestroyed();
 }
 
 void RenderSVGRoot::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
 {
-    if (diff.needsFullLayout())
+    if (diff == StyleDifferenceLayout)
         setNeedsBoundariesUpdate();
-    // FIXME: How about other diff flags?
-    if (diff.needsRepaintObjectOnly()) {
+    if (diff == StyleDifferenceRepaint) {
         // Box decorations may have appeared/disappeared - recompute status.
         m_hasBoxDecorations = calculateHasBoxDecorations();
     }
 
     RenderReplaced::styleDidChange(diff, oldStyle);
     SVGResourcesCache::clientStyleChanged(this, diff, style());
 }
 
 bool RenderSVGRoot::isChildAllowed(RenderObject* child, RenderStyle*) const
 {
@@ skipping 154 matching lines @@
             updateHitTestResult(result, pointInBorderBox);
             if (!result.addNodeToRectBasedTestResult(node(), request, locationInContainer, boundsRect))
                 return true;
         }
     }
 
     return false;
 }
 
 }