cc : Stop calculating visible rects on main thread

cc/trees/layer_tree_host_common.cc

 // 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.
 
 #include "cc/trees/layer_tree_host_common.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
 #include "base/trace_event/trace_event.h"
 #include "cc/base/math_util.h"
 #include "cc/layers/heads_up_display_layer_impl.h"
 #include "cc/layers/layer.h"
 #include "cc/layers/layer_impl.h"
 #include "cc/layers/layer_iterator.h"
 #include "cc/proto/begin_main_frame_and_commit_state.pb.h"
 #include "cc/proto/gfx_conversions.h"
 #include "cc/trees/draw_property_utils.h"
 #include "cc/trees/layer_tree_host.h"
 #include "cc/trees/layer_tree_impl.h"
+#include "cc/trees/property_tree_builder.h"
 #include "ui/gfx/geometry/rect_conversions.h"
 #include "ui/gfx/geometry/vector2d_conversions.h"
 #include "ui/gfx/transform.h"
 #include "ui/gfx/transform_util.h"
 
 namespace cc {
 
 LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting::
     CalcDrawPropsMainInputsForTesting(Layer* root_layer,
                                       const gfx::Size& device_viewport_size,
@@ skipping 1000 matching lines @@
 }
 
 void LayerTreeHostCommon::CalculateDrawPropertiesForTesting(
     CalcDrawPropsMainInputsForTesting* inputs) {
   LayerList update_layer_list;
   bool can_render_to_separate_surface = true;
   PropertyTrees* property_trees =
       inputs->root_layer->layer_tree_host()->property_trees();
   Layer* overscroll_elasticity_layer = nullptr;
   gfx::Vector2dF elastic_overscroll;
-  draw_property_utils::BuildPropertyTreesAndComputeVisibleRects(
+  PropertyTreeBuilder::BuildPropertyTrees(
       inputs->root_layer, inputs->page_scale_layer,
       inputs->inner_viewport_scroll_layer, inputs->outer_viewport_scroll_layer,
       overscroll_elasticity_layer, elastic_overscroll,
       inputs->page_scale_factor, inputs->device_scale_factor,
       gfx::Rect(inputs->device_viewport_size), inputs->device_transform,
-      can_render_to_separate_surface, property_trees, &update_layer_list);
+      property_trees);
+  draw_property_utils::UpdateRenderSurfaces(inputs->root_layer, property_trees);
+  draw_property_utils::UpdatePropertyTrees(property_trees,
+                                           can_render_to_separate_surface);
+  draw_property_utils::FindLayersThatNeedUpdates(
+      inputs->root_layer, property_trees->transform_tree,
+      property_trees->effect_tree, &update_layer_list);
+  draw_property_utils::ComputeVisibleRectsForTesting(
+      property_trees, can_render_to_separate_surface, &update_layer_list);
 }
 
 void LayerTreeHostCommon::CalculateDrawProperties(
     CalcDrawPropsImplInputs* inputs) {
   CalculateDrawPropertiesInternal(inputs, DONT_BUILD_PROPERTY_TREES);
 
   if (CdpPerfTracingEnabled()) {
     LayerTreeImpl* layer_tree_impl = inputs->root_layer->layer_tree_impl();
     if (layer_tree_impl->IsPendingTree() &&
         layer_tree_impl->is_first_frame_after_commit()) {
@@ skipping 48 matching lines @@
 
 PropertyTrees* GetPropertyTrees(Layer* layer) {
   return layer->layer_tree_host()->property_trees();
 }
 
 PropertyTrees* GetPropertyTrees(LayerImpl* layer) {
   return layer->layer_tree_impl()->property_trees();
 }
 
 }  // namespace cc