Fix sub-pixel handling of transparency boxes in DPL

Source/core/paint/DeprecatedPaintLayer.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. 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>
@@ skipping 497 matching lines @@
 
     void didUpdateNeedsCompositedScrolling();
 
     bool hasSelfPaintingLayerDescendant() const
     {
         if (m_hasSelfPaintingLayerDescendantDirty)
             updateHasSelfPaintingLayerDescendant();
         ASSERT(!m_hasSelfPaintingLayerDescendantDirty);
         return m_hasSelfPaintingLayerDescendant;
     }
-    LayoutRect paintingExtent(const DeprecatedPaintLayer* rootLayer, const LayoutRect& paintDirtyRect, const LayoutSize& subPixelAccumulation, GlobalPaintFlags);
+    LayoutRect paintingExtent(const DeprecatedPaintLayer* rootLayer, const LayoutRect& paintDirtyRect, GlobalPaintFlags);
     void appendSingleFragmentIgnoringPagination(DeprecatedPaintLayerFragments&, const DeprecatedPaintLayer* rootLayer, const LayoutRect& dirtyRect, ClipRectsCacheSlot, OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize, ShouldRespectOverflowClip = RespectOverflowClip, const LayoutPoint* offsetFromRoot = 0, const LayoutSize& subPixelAccumulation = LayoutSize());
     void collectFragments(DeprecatedPaintLayerFragments&, const DeprecatedPaintLayer* rootLayer, const LayoutRect& dirtyRect,
         ClipRectsCacheSlot, OverlayScrollbarSizeRelevancy inOverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize,
         ShouldRespectOverflowClip = RespectOverflowClip, const LayoutPoint* offsetFromRoot = 0,
         const LayoutSize& subPixelAccumulation = LayoutSize(), const LayoutRect* layerBoundingBox = 0);
 
     LayoutPoint layoutBoxLocation() const { return layoutObject()->isBox() ? toLayoutBox(layoutObject())->location() : LayoutPoint(); }
 
     enum TransparencyClipBoxBehavior {
         PaintingTransparencyClipBox,
         HitTestingTransparencyClipBox
     };
 
     enum TransparencyClipBoxMode {
         DescendantsOfTransparencyClipBox,
         RootOfTransparencyClipBox
     };
 
     static LayoutRect transparencyClipBox(const DeprecatedPaintLayer*, const DeprecatedPaintLayer* rootLayer, TransparencyClipBoxBehavior transparencyBehavior,
-        TransparencyClipBoxMode transparencyMode, const LayoutSize& subPixelAccumulation, GlobalPaintFlags = GlobalPaintNormalPhase);
+        TransparencyClipBoxMode transparencyMode, GlobalPaintFlags = GlobalPaintNormalPhase);
 
 private:
     // Bounding box in the coordinates of this layer.
     LayoutRect logicalBoundingBox() const;
 
     bool hasOverflowControls() const;
 
     void dirtyAncestorChainHasSelfPaintingLayerDescendantStatus();
 
     // Returns true if the position changed.
@@ skipping 170 matching lines @@
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLayerTree(const blink::DeprecatedPaintLayer*);
 void showLayerTree(const blink::LayoutObject*);
 #endif
 
 #endif // Layer_h