cc : Move LayerImpl::children to test properties

cc/test/fake_layer_tree_host_impl.cc

 // Copyright 2012 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/test/fake_layer_tree_host_impl.h"
 
 #include <stddef.h>
 
 #include "cc/animation/animation_host.h"
 #include "cc/test/begin_frame_args_test.h"
@@ skipping 71 matching lines @@
 
 void FakeLayerTreeHostImpl::AdvanceToNextFrame(base::TimeDelta advance_by) {
   BeginFrameArgs next_begin_frame_args = current_begin_frame_tracker_.Current();
   next_begin_frame_args.frame_time += advance_by;
   DidFinishImplFrame();
   WillBeginImplFrame(next_begin_frame_args);
 }
 
 int FakeLayerTreeHostImpl::RecursiveUpdateNumChildren(LayerImpl* layer) {
   int num_children_that_draw_content = 0;
-  for (size_t i = 0; i < layer->children().size(); ++i) {
+  for (size_t i = 0; i < layer->test_properties()->children.size(); ++i) {
     num_children_that_draw_content +=
-        RecursiveUpdateNumChildren(layer->children()[i]);
+        RecursiveUpdateNumChildren(layer->test_properties()->children[i]);
   }
   layer->test_properties()->num_descendants_that_draw_content =
       num_children_that_draw_content;
   return num_children_that_draw_content + (layer->DrawsContent() ? 1 : 0);
 }
 
 void FakeLayerTreeHostImpl::UpdateNumChildrenAndDrawPropertiesForActiveTree() {
   UpdateNumChildrenAndDrawProperties(active_tree());
 }
 
 void FakeLayerTreeHostImpl::UpdateNumChildrenAndDrawProperties(
     LayerTreeImpl* layerTree) {
   RecursiveUpdateNumChildren(layerTree->root_layer());
   bool update_lcd_text = false;
   layerTree->BuildLayerListAndPropertyTreesForTesting();
   layerTree->UpdateDrawProperties(update_lcd_text);
 }
 
 }  // namespace cc