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

Source/core/layout/TextAutosizer.cpp

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 769 matching lines @@
 
     ASSERT(cluster->m_multiplier);
     return cluster->m_multiplier;
 }
 
 bool TextAutosizer::superclusterHasEnoughTextToAutosize(Supercluster* supercluster, const LayoutBlock* widthProvider)
 {
     if (supercluster->m_hasEnoughTextToAutosize != UnknownAmountOfText)
         return supercluster->m_hasEnoughTextToAutosize == HasEnoughText;
 
-    BlockSet::iterator end = supercluster->m_roots->end();
-    for (BlockSet::iterator it = supercluster->m_roots->begin(); it != end; ++it) {
-        if (clusterWouldHaveEnoughTextToAutosize(*it, widthProvider)) {
+    for (auto* root : *supercluster->m_roots) {
+        if (clusterWouldHaveEnoughTextToAutosize(root, widthProvider)) {
             supercluster->m_hasEnoughTextToAutosize = HasEnoughText;
             return true;
         }
     }
     supercluster->m_hasEnoughTextToAutosize = NotEnoughText;
     return false;
 }
 
 float TextAutosizer::superclusterMultiplier(Cluster* cluster)
 {
@@ skipping 14 matching lines @@
 
     return deepestBlockContainingAllText(root);
 }
 
 const LayoutBlock* TextAutosizer::maxClusterWidthProvider(const Supercluster* supercluster, const LayoutBlock* currentRoot) const
 {
     const LayoutBlock* result = clusterWidthProvider(currentRoot);
     float maxWidth = widthFromBlock(result);
 
     const BlockSet* roots = supercluster->m_roots;
-    for (BlockSet::iterator it = roots->begin(); it != roots->end(); ++it) {
-        const LayoutBlock* widthProvider = clusterWidthProvider(*it);
+    for (const auto* root : *roots) {
+        const LayoutBlock* widthProvider = clusterWidthProvider(root);
         if (widthProvider->needsLayout())
             continue;
         float width = widthFromBlock(widthProvider);
         if (width > maxWidth) {
             maxWidth = width;
             result = widthProvider;
         }
     }
     RELEASE_ASSERT(result);
     return result;
@@ skipping 333 matching lines @@
     }
     return computedSize;
 }
 
 DEFINE_TRACE(TextAutosizer)
 {
     visitor->trace(m_document);
 }
 
 } // namespace blink