Calculate correct clip foregroundBound and backgroundBound

Source/core/paint/DeprecatedPaintLayerClipper.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 94 matching lines @@
     return clipRect;
 }
 
 void DeprecatedPaintLayerClipper::calculateRects(const ClipRectsContext& context, const LayoutRect& paintDirtyRect, LayoutRect& layerBounds,
     ClipRect& backgroundRect, ClipRect& foregroundRect, ClipRect& outlineRect, const LayoutPoint* offsetFromRoot) const
 {
     bool isClippingRoot = m_layoutObject.layer() == context.rootLayer;
 
     if (!isClippingRoot && m_layoutObject.layer()->parent()) {
         backgroundRect = backgroundClipRect(context);
-        backgroundRect.move(roundedIntSize(context.subPixelAccumulation));
+        backgroundRect.move(context.subPixelAccumulation);
         backgroundRect.intersect(paintDirtyRect);
     } else {
         backgroundRect = paintDirtyRect;
     }
 
     foregroundRect = backgroundRect;
     outlineRect = backgroundRect;
 
     LayoutPoint offset;
     if (offsetFromRoot)
@@ skipping 320 matching lines @@
     if (context.respectOverflowClip == IgnoreOverflowClip)
         return false;
 
     if (layer->isRootLayer() && context.respectOverflowClipForViewport == IgnoreOverflowClip)
         return false;
 
     return true;
 }
 
 } // namespace blink