Use C++11 range-based loop for core/layout

Source/core/layout/LayoutFlowThread.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 55 matching lines @@
 void LayoutFlowThread::validateRegions()
 {
     if (m_regionsInvalidated) {
         m_regionsInvalidated = false;
         m_regionsHaveUniformLogicalHeight = true;
 
         if (hasRegions()) {
             LayoutUnit previousRegionLogicalHeight = 0;
             bool firstRegionVisited = false;
 
-            for (LayoutMultiColumnSetList::iterator iter = m_multiColumnSetList.begin(); iter != m_multiColumnSetList.end(); ++iter) {
-                LayoutMultiColumnSet* columnSet = *iter;
+            for (auto* columnSet : m_multiColumnSetList) {
                 LayoutUnit regionLogicalHeight = columnSet->pageLogicalHeight();
 
                 if (!firstRegionVisited) {
                     firstRegionVisited = true;
                 } else {
                     if (m_regionsHaveUniformLogicalHeight && previousRegionLogicalHeight != regionLogicalHeight)
                         m_regionsHaveUniformLogicalHeight = false;
                 }
 
                 previousRegionLogicalHeight = regionLogicalHeight;
@@ skipping 100 matching lines @@
         LayoutMultiColumnSet* columnSet = *iter;
         columnSet->collectLayerFragments(layerFragments, layerBoundingBox, dirtyRect);
     }
 }
 
 LayoutRect LayoutFlowThread::fragmentsBoundingBox(const LayoutRect& layerBoundingBox) const
 {
     ASSERT(!m_regionsInvalidated);
 
     LayoutRect result;
-    for (LayoutMultiColumnSetList::const_iterator iter = m_multiColumnSetList.begin(); iter != m_multiColumnSetList.end(); ++iter) {
-        LayoutMultiColumnSet* columnSet = *iter;
+    for (auto* columnSet : m_multiColumnSetList) {
         DeprecatedPaintLayerFragments fragments;
         columnSet->collectLayerFragments(fragments, layerBoundingBox, LayoutRect(LayoutRect::infiniteIntRect()));
-        for (size_t i = 0; i < fragments.size(); ++i) {
-            const DeprecatedPaintLayerFragment& fragment = fragments.at(i);
+        for (const auto& fragment : fragments) {
             LayoutRect fragmentRect(layerBoundingBox);
             fragmentRect.intersect(fragment.paginationClip);
             fragmentRect.moveBy(fragment.paginationOffset);
             result.unite(fragmentRect);
         }
     }
 
     return result;
 }
 
 void LayoutFlowThread::MultiColumnSetSearchAdapter::collectIfNeeded(const MultiColumnSetInterval& interval)
 {
     if (m_result)
         return;
     if (interval.low() <= m_offset && interval.high() > m_offset)
         m_result = interval.data();
 }
 
 } // namespace blink