Move rendering/RenderBox to layout/LayoutBox.

Source/core/layout/LayerScrollableArea.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 539 matching lines @@
 int LayerScrollableArea::pageStep(ScrollbarOrientation orientation) const
 {
     int length = (orientation == HorizontalScrollbar) ?
         box().pixelSnappedClientWidth() : box().pixelSnappedClientHeight();
     int minPageStep = static_cast<float>(length) * ScrollableArea::minFractionToStepWhenPaging();
     int pageStep = max(minPageStep, length - ScrollableArea::maxOverlapBetweenPages());
 
     return max(pageStep, 1);
 }
 
-RenderBox& LayerScrollableArea::box() const
+LayoutBox& LayerScrollableArea::box() const
 {
-    return *m_layer.renderBox();
+    return *m_layer.layoutBox();
 }
 
 Layer* LayerScrollableArea::layer() const
 {
     return &m_layer;
 }
 
 LayoutUnit LayerScrollableArea::scrollWidth() const
 {
     if (m_scrollDimensionsDirty)
@@ skipping 178 matching lines @@
 static bool overflowDefinesAutomaticScrollbar(EOverflow overflow)
 {
     return overflow == OAUTO || overflow == OOVERLAY;
 }
 
 // This function returns true if the given box requires overflow scrollbars (as
 // opposed to the 'viewport' scrollbars managed by the LayerCompositor).
 // FIXME: we should use the same scrolling machinery for both the viewport and
 // overflow. Currently, we need to avoid producing scrollbars here if they'll be
 // handled externally in the RLC.
-static bool canHaveOverflowScrollbars(const RenderBox& box)
+static bool canHaveOverflowScrollbars(const LayoutBox& box)
 {
     bool rootLayerScrolls = box.document().settings() && box.document().settings()->rootLayerScrolls();
     return (rootLayerScrolls || !box.isRenderView()) && box.document().viewportDefiningElement() != box.node();
 }
 
 void LayerScrollableArea::updateAfterStyleChange(const LayoutStyle* oldStyle)
 {
     if (!m_scrollDimensionsDirty)
         updateScrollableAreaSet(hasScrollableHorizontalOverflow() || hasScrollableVerticalOverflow());
 
@@ skipping 610 matching lines @@
 void LayerScrollableArea::setTopmostScrollChild(Layer* scrollChild)
 {
     // We only want to track the topmost scroll child for scrollable areas with
     // overlay scrollbars.
     if (!hasOverlayScrollbars())
         return;
     m_nextTopmostScrollChild = scrollChild;
 }
 
 } // namespace blink