cc: Main thread skip single layers instead of subtrees

cc/trees/draw_property_utils.h

 // 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.
 
 #ifndef CC_TREES_DRAW_PROPERTY_UTILS_H_
 #define CC_TREES_DRAW_PROPERTY_UTILS_H_
 
 #include "cc/base/cc_export.h"
 #include "cc/layers/layer_collections.h"
 
@@ skipping 43 matching lines @@
     bool can_render_to_separate_surface,
     PropertyTrees* property_trees,
     LayerImplList* visible_layer_list);
 
 void CC_EXPORT UpdateRenderSurfaces(Layer* root_layer,
                                     PropertyTrees* property_trees);
 
 void CC_EXPORT UpdatePropertyTrees(PropertyTrees* property_trees,
                                    bool can_render_to_separate_surface);
 
-void CC_EXPORT FindLayersThatNeedUpdates(Layer* layer,
+void CC_EXPORT FindLayersThatNeedUpdates(Layer* root_layer,

[ajuma, 2016/04/06 19:49:28]

This should take a LayerTreeHost instead of a Layer.

[sunxd, 2016/04/07 15:37:13]

Done.

                                          const TransformTree& transform_tree,
                                          const EffectTree& effect_tree,
                                          LayerList* update_layer_list);
 
 void CC_EXPORT
 ComputeVisibleRectsForTesting(PropertyTrees* property_trees,
                               bool can_render_to_separate_surface,
                               LayerList* visible_layer_list);
 
 void CC_EXPORT ComputeVisibleRects(LayerImpl* root_layer,
@@ skipping 49 matching lines @@
 
 void CC_EXPORT
 UpdateElasticOverscroll(PropertyTrees* property_trees,
                         const Layer* overscroll_elasticity_layer,
                         const gfx::Vector2dF& elastic_overscroll);
 
 }  // namespace draw_property_utils
 }  // namespace cc
 
 #endif  // CC_TREES_DRAW_PROPERTY_UTILS_H_