Split computeScrollDimensions() out of RenderLayer

Source/core/rendering/RenderBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. 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 480 matching lines @@
 }
 
 int RenderBox::scrollTop() const
 {
     return hasOverflowClip() ? layer()->scrollYOffset() : 0;
 }
 
 void RenderBox::setScrollLeft(int newLeft)
 {
     if (hasOverflowClip())
-        layer()->scrollToXOffset(newLeft, RenderLayer::ScrollOffsetClamped);
+        layer()->scrollToXOffset(newLeft, ScrollOffsetClamped);
 }
 
 void RenderBox::setScrollTop(int newTop)
 {
     if (hasOverflowClip())
-        layer()->scrollToYOffset(newTop, RenderLayer::ScrollOffsetClamped);
+        layer()->scrollToYOffset(newTop, ScrollOffsetClamped);
 }
 
 void RenderBox::absoluteRects(Vector<IntRect>& rects, const LayoutPoint& accumulatedOffset) const
 {
     rects.append(pixelSnappedIntRect(accumulatedOffset, size()));
 }
 
 void RenderBox::absoluteQuads(Vector<FloatQuad>& quads, bool* wasFixed) const
 {
     quads.append(localToAbsoluteQuad(FloatRect(0, 0, width(), height()), 0 /* mode */, wasFixed));
@@ skipping 4216 matching lines @@
     }
 
     if (didSplitParentAnonymousBoxes)
         markBoxForRelayoutAfterSplit(this);
 
     ASSERT(beforeChild->parent() == this);
     return beforeChild;
 }
 
 } // namespace WebCore