Add wrapper container for a vector of OwnPtr<T>

cc/TreeSynchronizer.cpp

 // 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 "config.h"
 
 #include "TreeSynchronizer.h"
 
 #include "CCLayerImpl.h"
 #include "CCScrollbarAnimationController.h"
@@ skipping 18 matching lines @@
     return newTree.release();
 }
 
 void TreeSynchronizer::collectExistingCCLayerImplRecursive(OwnPtrCCLayerImplMap& oldLayers, PassOwnPtr<CCLayerImpl> popCCLayerImpl)
 {
     OwnPtr<CCLayerImpl> ccLayerImpl = popCCLayerImpl;
 
     if (!ccLayerImpl)
         return;
 
-    Vector<OwnPtr<CCLayerImpl> >& children = ccLayerImpl->m_children;
+    OwnPtrVector<CCLayerImpl>& children = ccLayerImpl->m_children;
     for (size_t i = 0; i < children.size(); ++i)
-        collectExistingCCLayerImplRecursive(oldLayers, children[i].release());
+        collectExistingCCLayerImplRecursive(oldLayers, children.take(i));
 
     collectExistingCCLayerImplRecursive(oldLayers, ccLayerImpl->m_maskLayer.release());
     collectExistingCCLayerImplRecursive(oldLayers, ccLayerImpl->m_replicaLayer.release());
 
     int id = ccLayerImpl->id();
     oldLayers.set(id, ccLayerImpl.release());
 }
 
 PassOwnPtr<CCLayerImpl> TreeSynchronizer::reuseOrCreateCCLayerImpl(RawPtrCCLayerImplMap& newLayers, OwnPtrCCLayerImplMap& oldLayers, LayerChromium* layer)
 {
@@ skipping 51 matching lines @@
     CCLayerImpl* ccScrollLayerImpl = newLayers.get(scrollbarLayer->scrollLayerId());
     ASSERT(ccScrollLayerImpl);
 
     if (ccScrollbarLayerImpl->orientation() == WebKit::WebScrollbar::Horizontal)
         ccScrollLayerImpl->setHorizontalScrollbarLayer(ccScrollbarLayerImpl);
     else
         ccScrollLayerImpl->setVerticalScrollbarLayer(ccScrollbarLayerImpl);
 }
 
 } // namespace cc