Refactor fixed layout mode

Source/core/rendering/RenderLayerScrollableArea.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 377 matching lines @@
 }
 
 IntPoint RenderLayerScrollableArea::maximumScrollPosition() const
 {
     if (!m_box->hasOverflowClip())
         return -scrollOrigin();
 
     return -scrollOrigin() + enclosingIntRect(m_overflowRect).size() - enclosingIntRect(m_box->clientBoxRect()).size();
 }
 
-IntRect RenderLayerScrollableArea::visibleContentRect(VisibleContentRectIncludesScrollbars scrollbarInclusion) const
+IntRect RenderLayerScrollableArea::visibleContentRect(IncludeScrollbarsInRect scrollbarInclusion) const
 {
     int verticalScrollbarWidth = 0;
     int horizontalScrollbarHeight = 0;
     if (scrollbarInclusion == IncludeScrollbars) {
         verticalScrollbarWidth = (verticalScrollbar() && !verticalScrollbar()->isOverlayScrollbar()) ? verticalScrollbar()->width() : 0;
         horizontalScrollbarHeight = (horizontalScrollbar() && !horizontalScrollbar()->isOverlayScrollbar()) ? horizontalScrollbar()->height() : 0;
     }
 
     return IntRect(IntPoint(scrollXOffset(), scrollYOffset()),
         IntSize(max(0, layer()->size().width() - verticalScrollbarWidth), max(0, layer()->size().height() - horizontalScrollbarHeight)));
@@ skipping 855 matching lines @@
         baseHeight = baseHeight / zoomFactor;
         element->setInlineStyleProperty(CSSPropertyHeight, roundToInt(baseHeight + difference.height()), CSSPrimitiveValue::CSS_PX);
     }
 
     document.updateLayout();
 
     // FIXME (Radar 4118564): We should also autoscroll the window as necessary to keep the point under the cursor in view.
 }
 
 } // Namespace WebCore