Revert "Revert 253606 "Revert 251238 "cc: Clean up iterator template to ...""

cc/trees/layer_tree_host_common.cc

Index: cc/trees/layer_tree_host_common.cc
diff --git a/cc/trees/layer_tree_host_common.cc b/cc/trees/layer_tree_host_common.cc
index ddee3930165c6bdf6cfc91be44d68bffd368ad29..587a28566a70d83cf05d84629b1accde9f2997bd 100644
--- a/cc/trees/layer_tree_host_common.cc
+++ b/cc/trees/layer_tree_host_common.cc
@@ -2324,8 +2324,12 @@ LayerImpl* LayerTreeHostCommon::FindLayerThatIsHitByPoint(
     const LayerImplList& render_surface_layer_list) {
   LayerImpl* found_layer = NULL;
 
-  typedef LayerIterator<LayerImpl> LayerIteratorType;
+  typedef LayerIterator<LayerImpl,
+                        LayerImplList,
+                        RenderSurfaceImpl,
+                        LayerIteratorActions::FrontToBack> LayerIteratorType;
   LayerIteratorType end = LayerIteratorType::End(&render_surface_layer_list);
+
   for (LayerIteratorType
            it = LayerIteratorType::Begin(&render_surface_layer_list);
        it != end;