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

Source/core/layout/LayoutTableSection.cpp

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 981 matching lines @@
                 if (!child->isText() && child->style()->logicalHeight().isPercent()
                     && (flexAllChildren || shouldFlexCellChild(child))
                     && (!child->isTable() || toLayoutTable(child)->hasSections())) {
                     cellChildrenFlex = true;
                     break;
                 }
             }
 
             if (!cellChildrenFlex) {
                 if (TrackedRendererListHashSet* percentHeightDescendants = cell->percentHeightDescendants()) {
-                    TrackedRendererListHashSet::iterator end = percentHeightDescendants->end();
-                    for (TrackedRendererListHashSet::iterator it = percentHeightDescendants->begin(); it != end; ++it) {
-                        if (flexAllChildren || shouldFlexCellChild(*it)) {
+                    for (auto* descendant : *percentHeightDescendants) {
+                        if (flexAllChildren || shouldFlexCellChild(descendant)) {
                             cellChildrenFlex = true;
                             break;
                         }
                     }
                 }
             }
 
             if (cellChildrenFlex) {
                 // Alignment within a cell is based off the calculated
                 // height, which becomes irrelevant once the cell has
@@ skipping 602 matching lines @@
     // FIXME: The table's direction should determine our row's direction, not the section's (see bug 96691).
     if (!style()->isLeftToRightDirection())
         cellLocation.setX(table()->columnPositions()[table()->numEffCols()] - table()->columnPositions()[table()->colToEffCol(cell->col() + cell->colSpan())] + horizontalBorderSpacing);
     else
         cellLocation.setX(table()->columnPositions()[effectiveColumn] + horizontalBorderSpacing);
 
     cell->setLogicalLocation(cellLocation);
 }
 
 } // namespace blink