Cleanup: Remove LayoutRegion.

Source/core/paint/DeprecatedPaintLayerClipper.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 160 matching lines @@
     if (m_cache)
         m_cache->clear(cacheSlot);
 
     for (DeprecatedPaintLayer* layer = m_layoutObject.layer()->firstChild(); layer; layer = layer->nextSibling())
         layer->clipper().clearClipRectsIncludingDescendants(cacheSlot);
 }
 
 LayoutRect DeprecatedPaintLayerClipper::childrenClipRect() const
 {
     // FIXME: border-radius not accounted for.
-    // FIXME: Regions not accounted for.
+    // FIXME: Flow thread based columns not accounted for.
     DeprecatedPaintLayer* clippingRootLayer = clippingRootForPainting();
     LayoutRect layerBounds;
     ClipRect backgroundRect, foregroundRect, outlineRect;
     // Need to use uncached clip rects, because the value of 'dontClipToOverflow' may be different from the painting path (<rdar://problem/11844909>).
     ClipRectsContext context(clippingRootLayer, UncachedClipRects);
     calculateRects(context, LayoutRect(m_layoutObject.view()->unscaledDocumentRect()), layerBounds, backgroundRect, foregroundRect, outlineRect);
     return LayoutRect(clippingRootLayer->layoutObject()->localToAbsoluteQuad(FloatQuad(foregroundRect.rect())).enclosingBoundingBox());
 }
 
 LayoutRect DeprecatedPaintLayerClipper::localClipRect() const
@@ skipping 47 matching lines @@
             if (m_layoutObject.style()->hasBorderRadius())
                 foregroundRect.setHasRadius(true);
         }
 
         // If we establish an overflow clip at all, then go ahead and make sure our background
         // rect is intersected with our layer's bounds including our visual overflow,
         // since any visual overflow like box-shadow or border-outset is not clipped by overflow:auto/hidden.
         if (toLayoutBox(m_layoutObject).hasVisualOverflow()) {
             // FIXME: Perhaps we should be propagating the borderbox as the clip rect for children, even though
             //        we may need to inflate our clip specifically for shadows or outsets.
-            // FIXME: Does not do the right thing with CSS regions yet, since we don't yet factor in the
-            // individual region boxes as overflow.
+            // FIXME: Does not do the right thing with columns yet, since we don't yet factor in the
+            // individual column boxes as overflow.
             LayoutRect layerBoundsWithVisualOverflow = toLayoutBox(m_layoutObject).visualOverflowRect();
             toLayoutBox(m_layoutObject).flipForWritingMode(layerBoundsWithVisualOverflow); // DeprecatedPaintLayer are in physical coordinates, so the overflow has to be flipped.
             layerBoundsWithVisualOverflow.moveBy(offset);
             if (!isClippingRoot || context.respectOverflowClip == RespectOverflowClip)
                 backgroundRect.intersect(layerBoundsWithVisualOverflow);
         } else {
             LayoutRect bounds = toLayoutBox(m_layoutObject).borderBoxRect();
             bounds.moveBy(offset);
             if (!isClippingRoot || context.respectOverflowClip == RespectOverflowClip)
                 backgroundRect.intersect(bounds);
@@ skipping 104 matching lines @@
         ASSERT(current);
         if (current->transform() || current->isPaintInvalidationContainer())
             return const_cast<DeprecatedPaintLayer*>(current);
     }
 
     ASSERT_NOT_REACHED();
     return 0;
 }
 
 } // namespace blink