Cleanup: Remove LayoutRegion.

Source/core/layout/compositing/CompositedDeprecatedPaintLayerMapping.cpp

 /*
  * Copyright (C) 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 1790 matching lines @@
 
     if (m_owningLayer.hasVisibleBoxDecorations())
         return true;
 
     if (layoutObject->hasMask()) // masks require special treatment
         return true;
 
     if (layoutObject->isReplaced() && !isCompositedPlugin(layoutObject))
         return true;
 
-    if (layoutObject->isLayoutRegion())
+    if (layoutObject->isLayoutMultiColumnSet())
         return true;
 
     if (layoutObject->node() && layoutObject->node()->isDocumentNode()) {
         // Look to see if the root object has a non-simple background
         LayoutObject* rootObject = layoutObject->document().documentElement() ? layoutObject->document().documentElement()->layoutObject() : 0;
         // Reject anything that has a border, a border-radius or outline,
         // or is not a simple background (no background, or solid color).
         if (rootObject && hasBoxDecorationsOrBackgroundImage(rootObject->styleRef()))
             return true;
 
@@ skipping 279 matching lines @@
     }
 
 #if ENABLE(ASSERT)
     paintInfo.paintLayer->layoutObject()->assertSubtreeIsLaidOut();
 #endif
 
     float deviceScaleFactor = blink::deviceScaleFactor(paintInfo.paintLayer->layoutObject()->frame());
     context->setDeviceScaleFactor(deviceScaleFactor);
 
     if (paintInfo.paintLayer->compositingState() != PaintsIntoGroupedBacking) {
-        // FIXME: GraphicsLayers need a way to split for LayoutRegions.
+        // FIXME: GraphicsLayers need a way to split for multicol.
         DeprecatedPaintLayerPaintingInfo paintingInfo(paintInfo.paintLayer, LayoutRect(dirtyRect), PaintBehaviorNormal, paintInfo.paintLayer->subpixelAccumulation());
         DeprecatedPaintLayerPainter(*paintInfo.paintLayer).paintLayerContents(context, paintingInfo, paintLayerFlags);
 
         if (paintInfo.paintLayer->containsDirtyOverlayScrollbars())
             DeprecatedPaintLayerPainter(*paintInfo.paintLayer).paintLayerContents(context, paintingInfo, paintLayerFlags | PaintLayerPaintingOverlayScrollbars);
     } else {
         DeprecatedPaintLayerPaintingInfo paintingInfo(paintInfo.paintLayer, LayoutRect(dirtyRect), PaintBehaviorNormal, paintInfo.paintLayer->subpixelAccumulation());
 
         // DeprecatedPaintLayer::paintLayer assumes that the caller clips to the passed rect. Squashed layers need to do this clipping in software,
         // since there is no graphics layer to clip them precisely. Furthermore, in some cases we squash layers that need clipping in software
@@ skipping 216 matching lines @@
     } else if (graphicsLayer == m_scrollingBlockSelectionLayer.get()) {
         name = "Scrolling Block Selection Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace blink