cc : Stop calculating visible rects on main thread

cc/test/layer_tree_host_common_test.cc

 // Copyright 2014 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/layer_tree_host_common_test.h"
 
 #include <stddef.h>
 
 #include "cc/layers/layer.h"
 #include "cc/layers/layer_impl.h"
@@ skipping 97 matching lines @@
       root_layer->layer_tree_host()->outer_viewport_scroll_layer();
   const Layer* overscroll_elasticity_layer =
       root_layer->layer_tree_host()->overscroll_elasticity_layer();
   gfx::Vector2dF elastic_overscroll =
       root_layer->layer_tree_host()->elastic_overscroll();
   float page_scale_factor = 1.f;
   float device_scale_factor = 1.f;
   gfx::Size device_viewport_size =
       gfx::Size(root_layer->bounds().width() * device_scale_factor,
                 root_layer->bounds().height() * device_scale_factor);
+  PropertyTrees* property_trees =
+      root_layer->layer_tree_host()->property_trees();
+  update_layer_list_.clear();
   draw_property_utils::BuildPropertyTreesAndComputeVisibleRects(
       root_layer, page_scale_layer, inner_viewport_scroll_layer,
       outer_viewport_scroll_layer, overscroll_elasticity_layer,
       elastic_overscroll, page_scale_factor, device_scale_factor,
-      gfx::Rect(device_viewport_size), identity_transform,
-      can_render_to_separate_surface,
-      root_layer->layer_tree_host()->property_trees(), &update_layer_list_);
+      gfx::Rect(device_viewport_size), identity_transform, property_trees);
+  draw_property_utils::Update(root_layer, property_trees,
+                              can_render_to_separate_surface,
+                              &update_layer_list_);
+  draw_property_utils::ComputeVisibleRectsForTesting(
+      property_trees, can_render_to_separate_surface, &update_layer_list_);
 }
 
 void LayerTreeHostCommonTestBase::
     ExecuteCalculateDrawPropertiesWithPropertyTrees(LayerImpl* root_layer) {
   DCHECK(root_layer->layer_tree_impl());
   LayerTreeHostCommon::PreCalculateMetaInformationForTesting(root_layer);
 
   gfx::Transform identity_transform;
 
   bool can_render_to_separate_surface = true;
@@ skipping 92 matching lines @@
 
 LayerTreeHostCommonTest::LayerTreeHostCommonTest()
     : LayerTreeHostCommonTestBase(LayerTreeSettings()) {}
 
 LayerTreeHostCommonTest::LayerTreeHostCommonTest(
     const LayerTreeSettings& settings)
     : LayerTreeHostCommonTestBase(settings) {
 }
 
 }  // namespace cc