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

cc/tree_synchronizer.cc

Index: cc/tree_synchronizer.cc
diff --git a/cc/tree_synchronizer.cc b/cc/tree_synchronizer.cc
index 4c51a16a827cb58851e37e633b8e31707bbedc95..b93e037710b9e4564d41877b3dc3021b9c052653 100644
--- a/cc/tree_synchronizer.cc
+++ b/cc/tree_synchronizer.cc
@@ -32,8 +32,8 @@ void TreeSynchronizer::collectExistingLayerImplRecursive(ScopedPtrLayerImplMap&
         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());