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"
 
 namespace gfx {
 class Rect;
 class Transform;
 class Vector2dF;
 }  // namespace gfx
 
 namespace cc {
 
 class ClipTree;
 struct DrawProperties;
 class Layer;
 class LayerImpl;
+class LayerTreeHost;
 class RenderSurfaceImpl;
 class EffectTree;
 class TransformTree;
 class PropertyTrees;
 
 namespace draw_property_utils {
 
 // Computes combined clips for every node in |clip_tree|. This function requires
 // that |transform_tree| has been updated via |ComputeTransforms|.
 void CC_EXPORT ComputeClips(ClipTree* clip_tree,
@@ skipping 21 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(LayerTreeHost* layer_tree_host,
                                          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,
                                    PropertyTrees* property_trees,
                                    bool can_render_to_separate_surface,
                                    LayerImplList* visible_layer_list);
 
 void CC_EXPORT ComputeLayerDrawProperties(LayerImpl* layer,
                                           const PropertyTrees* property_trees,
                                           bool layers_always_allowed_lcd_text,
                                           bool can_use_lcd_text);
 
 void CC_EXPORT ComputeSurfaceDrawProperties(const PropertyTrees* property_trees,
                                             RenderSurfaceImpl* render_surface);
 
 bool CC_EXPORT LayerShouldBeSkipped(LayerImpl* layer,
                                     bool layer_is_drawn,
-                                    const TransformTree& transform_tree);
+                                    const TransformTree& transform_tree,
+                                    const EffectTree& effect_tree);
 
 bool CC_EXPORT LayerNeedsUpdate(Layer* layer,
                                 bool layer_is_drawn,
                                 const TransformTree& tree);
 
 bool CC_EXPORT LayerNeedsUpdate(LayerImpl* layer,
                                 bool layer_is_drawn,
                                 const TransformTree& tree);
 
 gfx::Transform CC_EXPORT DrawTransform(const LayerImpl* layer,
@@ skipping 24 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_