Remove default parameter from virtual layoutBlock function

Source/core/rendering/RenderRegion.cpp

 /*
  * Copyright (C) 2011 Adobe Systems Incorporated. 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.
@@ skipping 267 matching lines @@
         return;
     }
 
     checkRegionStyle();
     updateRegionHasAutoLogicalHeightFlag();
 
     if (oldStyle && oldStyle->writingMode() != style()->writingMode())
         m_flowThread->regionChangedWritingMode(this);
 }
 
-void RenderRegion::layoutBlock(bool relayoutChildren, LayoutUnit)
+void RenderRegion::layoutBlock(bool relayoutChildren)
 {
     RenderBlockFlow::layoutBlock(relayoutChildren);
 
     if (isValid()) {
         LayoutRect oldRegionRect(flowThreadPortionRect());
         if (!isHorizontalWritingMode())
             oldRegionRect = oldRegionRect.transposedRect();
 
         if (hasAutoLogicalHeight() && !m_flowThread->inConstrainedLayoutPhase()) {
             m_flowThread->invalidateRegions();
@@ skipping 380 matching lines @@
     return generatingNode();
 }
 
 bool RenderRegion::isElementBasedRegion() const
 {
     Node* node = nodeForRegion();
     return node && node->isElementNode() && !node->isPseudoElement();
 }
 
 } // namespace WebCore