cc: Update effect_tree backface visibility when transform is updated.

cc/trees/draw_property_utils.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/trees/draw_property_utils.h"
 
 #include <stddef.h>
 
 #include <vector>
 
@@ skipping 746 matching lines @@
     LayerImpl* root_layer,
     PropertyTrees* property_trees,
     bool can_render_to_separate_surface,
     LayerImplList* update_layer_list,
     std::vector<LayerImpl*>* visible_layer_list) {
   if (property_trees->non_root_surfaces_enabled !=
       can_render_to_separate_surface) {
     property_trees->non_root_surfaces_enabled = can_render_to_separate_surface;
     property_trees->transform_tree.set_needs_update(true);
   }
-  if (property_trees->transform_tree.needs_update())
+  if (property_trees->transform_tree.needs_update()) {
     property_trees->clip_tree.set_needs_update(true);
+    property_trees->effect_tree.set_needs_update(true);
+  }
   UpdateRenderTarget(&property_trees->effect_tree,
                      property_trees->non_root_surfaces_enabled);
   ComputeTransforms(&property_trees->transform_tree);
   ComputeClips(&property_trees->clip_tree, property_trees->transform_tree,
                can_render_to_separate_surface);
   ComputeEffects(&property_trees->effect_tree);
 
   FindLayersThatNeedUpdates(
       root_layer->layer_tree_impl(), property_trees->transform_tree,
       property_trees->effect_tree, update_layer_list, visible_layer_list);
   CalculateVisibleRects<LayerImpl>(
       *visible_layer_list, property_trees->clip_tree,
       property_trees->transform_tree, can_render_to_separate_surface);
 }
 
 void UpdatePropertyTrees(PropertyTrees* property_trees,
                          bool can_render_to_separate_surface) {
   if (property_trees->non_root_surfaces_enabled !=
       can_render_to_separate_surface) {
     property_trees->non_root_surfaces_enabled = can_render_to_separate_surface;
     property_trees->transform_tree.set_needs_update(true);
   }
-  if (property_trees->transform_tree.needs_update())
+  if (property_trees->transform_tree.needs_update()) {
     property_trees->clip_tree.set_needs_update(true);
+    property_trees->effect_tree.set_needs_update(true);
+  }
   ComputeTransforms(&property_trees->transform_tree);
   ComputeClips(&property_trees->clip_tree, property_trees->transform_tree,
                can_render_to_separate_surface);
   ComputeEffects(&property_trees->effect_tree);
 }
 
 void ComputeVisibleRectsForTesting(PropertyTrees* property_trees,
                                    bool can_render_to_separate_surface,
                                    LayerList* update_layer_list) {
   CalculateVisibleRects<Layer>(*update_layer_list, property_trees->clip_tree,
@@ skipping 446 matching lines @@
 void UpdateElasticOverscroll(PropertyTrees* property_trees,
                              const Layer* overscroll_elasticity_layer,
                              const gfx::Vector2dF& elastic_overscroll) {
   UpdateElasticOverscrollInternal(property_trees, overscroll_elasticity_layer,
                                   elastic_overscroll);
 }
 
 }  // namespace draw_property_utils
 
 }  // namespace cc