cc: Make the ScopedPtrVector and ScopedPtrDeque containers act like STL vector and deque.

cc/tree_synchronizer.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/tree_synchronizer.h"
 
 #include "cc/layer.h"
 #include "cc/layer_impl.h"
 #include "cc/scrollbar_animation_controller.h"
 #include "cc/scrollbar_layer.h"
@@ skipping 14 matching lines @@
 
     return newTree.Pass();
 }
 
 void TreeSynchronizer::collectExistingLayerImplRecursive(ScopedPtrLayerImplMap& oldLayers, scoped_ptr<LayerImpl> layerImpl)
 {
     if (!layerImpl)
         return;
 
     ScopedPtrVector<LayerImpl>& children = layerImpl->m_children;
-    for (size_t i = 0; i < children.size(); ++i)
-        collectExistingLayerImplRecursive(oldLayers, children.take(i));
+    for (ScopedPtrVector<LayerImpl>::iterator it = children.begin(); it != children.end(); ++it)
+        collectExistingLayerImplRecursive(oldLayers, children.take(it));
 
     collectExistingLayerImplRecursive(oldLayers, layerImpl->m_maskLayer.Pass());
     collectExistingLayerImplRecursive(oldLayers, layerImpl->m_replicaLayer.Pass());
 
     int id = layerImpl->id();
     oldLayers.set(id, layerImpl.Pass());
 }
 
 scoped_ptr<LayerImpl> TreeSynchronizer::reuseOrCreateLayerImpl(RawPtrLayerImplMap& newLayers, ScopedPtrLayerImplMap& oldLayers, Layer* layer)
 {
@@ skipping 54 matching lines @@
     DCHECK(scrollbarLayerImpl);
     DCHECK(scrollLayerImpl);
 
     if (scrollbarLayerImpl->orientation() == WebKit::WebScrollbar::Horizontal)
         scrollLayerImpl->setHorizontalScrollbarLayer(scrollbarLayerImpl);
     else
         scrollLayerImpl->setVerticalScrollbarLayer(scrollbarLayerImpl);
 }
 
 }  // namespace cc