cc: Make all layer recursion use CallFunctionForSubtree

cc/trees/layer_tree_host_common.h

 // 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.
 
 #ifndef CC_TREES_LAYER_TREE_HOST_COMMON_H_
 #define CC_TREES_LAYER_TREE_HOST_COMMON_H_
 
 #include <vector>
 
 #include "base/memory/ref_counted.h"
@@ skipping 46 matching lines @@
       const LayerImplList& render_surface_layer_list);
 
   static bool LayerHasTouchEventHandlersAt(gfx::PointF screen_space_point,
                                            LayerImpl* layer_impl);
 
   template <typename LayerType>
   static bool RenderSurfaceContributesToTarget(LayerType*,
                                                int target_surface_layer_id);
 
   template <class Function, typename LayerType>
-  static void CallFunctionForSubtree(LayerType* root_layer);
+  static void CallFunctionForSubtree(Function function, LayerType* root_layer);
 
   // Returns a layer with the given id if one exists in the subtree starting
   // from the given root layer (including mask and replica layers).
   template <typename LayerType>
   static LayerType* FindLayerInSubtree(LayerType* root_layer, int layer_id);
 
   static Layer* get_child_as_raw_ptr(
       const LayerList& children,
       size_t index) {
     return children[index].get();
@@ skipping 48 matching lines @@
     return root_layer->replica_layer();
 
   for (size_t i = 0; i < root_layer->children().size(); ++i) {
     if (LayerType* found = FindLayerInSubtree(
             get_child_as_raw_ptr(root_layer->children(), i), layer_id))
       return found;
   }
   return NULL;
 }
 
-template <class Function, typename LayerType>
-void LayerTreeHostCommon::CallFunctionForSubtree(LayerType* root_layer) {
-  Function()(root_layer);
+template <typename Function, typename LayerType>
+void LayerTreeHostCommon::CallFunctionForSubtree(Function function,
+                                                 LayerType* root_layer) {
+  function(root_layer);
 
   if (LayerType* mask_layer = root_layer->mask_layer())
-    Function()(mask_layer);
+    function(mask_layer);
   if (LayerType* replica_layer = root_layer->replica_layer()) {
-    Function()(replica_layer);
+    function(replica_layer);
     if (LayerType* mask_layer = replica_layer->mask_layer())
-      Function()(mask_layer);
+      function(mask_layer);
   }
 
   for (size_t i = 0; i < root_layer->children().size(); ++i) {
-    CallFunctionForSubtree<Function>(
-        get_child_as_raw_ptr(root_layer->children(), i));
+    CallFunctionForSubtree(function,
+                           get_child_as_raw_ptr(root_layer->children(), i));
   }
 }
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_COMMON_H_