Fix overflow:overlay scrollbar width for paint.

third_party/WebKit/Source/core/layout/svg/LayoutSVGRoot.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 212 matching lines @@
 
 LayoutRect LayoutSVGRoot::visualOverflowRect() const {
   LayoutRect rect = LayoutReplaced::selfVisualOverflowRect();
   if (!shouldApplyViewportClip())
     rect.unite(contentsVisualOverflowRect());
   return rect;
 }
 
 LayoutRect LayoutSVGRoot::overflowClipRect(const LayoutPoint& location,
                                            OverlayScrollbarClipBehavior) const {
-  return LayoutRect(pixelSnappedIntRect(
-      LayoutReplaced::overflowClipRect(location, IgnoreOverlayScrollbarSize)));
+  return LayoutRect(pixelSnappedIntRect(LayoutReplaced::overflowClipRect(
+      location, IgnorePlatformOverlayScrollbarSize)));
 }
 
 void LayoutSVGRoot::paintReplaced(const PaintInfo& paintInfo,
                                   const LayoutPoint& paintOffset) const {
   SVGRootPainter(*this).paintReplaced(paintInfo, paintOffset);
 }
 
 void LayoutSVGRoot::willBeDestroyed() {
   SVGResourcesCache::clientDestroyed(this);
   LayoutReplaced::willBeDestroyed();
@@ skipping 239 matching lines @@
       if (result.addNodeToListBasedTestResult(node(), locationInContainer,
                                               boundsRect) == StopHitTesting)
         return true;
     }
   }
 
   return false;
 }
 
 }  // namespace blink