Replace collectLayerFragments() with FragmentainerIterator.

third_party/WebKit/Source/core/layout/LayoutMultiColumnSet.cpp

 /*
  * Copyright (C) 2012 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 401 matching lines @@
 }
 
 LayoutRect LayoutMultiColumnSet::fragmentsBoundingBox(const LayoutRect& boundingBoxInFlowThread) const
 {
     LayoutRect result;
     for (const auto& group : m_fragmentainerGroups)
         result.unite(group.fragmentsBoundingBox(boundingBoxInFlowThread));
     return result;
 }
 
-void LayoutMultiColumnSet::collectLayerFragments(PaintLayerFragments& fragments, const LayoutRect& layerBoundingBox, const LayoutRect& dirtyRect)
-{
-    for (const auto& group : m_fragmentainerGroups)
-        group.collectLayerFragments(fragments, layerBoundingBox, dirtyRect);
-}
-
 void LayoutMultiColumnSet::addOverflowFromChildren()
 {
     LayoutRect overflowRect;
     for (const auto& group : m_fragmentainerGroups) {
         LayoutRect rect = group.calculateOverflow();
         rect.move(group.offsetFromColumnSet());
         overflowRect.unite(rect);
     }
     addLayoutOverflow(overflowRect);
     addContentsVisualOverflow(overflowRect);
@@ skipping 103 matching lines @@
     // Now add in column rule bounds, if present.
     Vector<LayoutRect> columnRuleBounds;
     if (computeColumnRuleBounds(LayoutPoint(), columnRuleBounds)) {
         for (auto& bound : columnRuleBounds)
             blockFlowBounds.unite(bound);
     }
     return blockFlowBounds;
 }
 
 } // namespace blink