Compute if a layer is drawn without LayerTree hierarchy

cc/layers/layer.h

 // Copyright 2010 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_LAYERS_LAYER_H_
 #define CC_LAYERS_LAYER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 122 matching lines @@
   bool masks_to_bounds() const { return masks_to_bounds_; }
 
   void SetMaskLayer(Layer* mask_layer);
   Layer* mask_layer() { return mask_layer_.get(); }
   const Layer* mask_layer() const { return mask_layer_.get(); }
 
   virtual void SetNeedsDisplayRect(const gfx::Rect& dirty_rect);
   void SetNeedsDisplay() { SetNeedsDisplayRect(gfx::Rect(bounds())); }
 
   void SetOpacity(float opacity);
-  float opacity() const { return opacity_; }
+  float opacity() const { return hide_layer_and_subtree_ ? 0.f : opacity_; }
   bool OpacityIsAnimating() const;
   bool HasPotentiallyRunningOpacityAnimation() const;
   virtual bool OpacityCanAnimateOnImplThread() const;
 
   void SetBlendMode(SkXfermode::Mode blend_mode);
   SkXfermode::Mode blend_mode() const { return blend_mode_; }
 
   void set_draw_blend_mode(SkXfermode::Mode blend_mode) {
     if (draw_blend_mode_ == blend_mode)
       return;
@@ skipping 400 matching lines @@
 
   void SetMutableProperties(uint32_t properties);
   uint32_t mutable_properties() const { return mutable_properties_; }
 
   void set_visited(bool visited);
   bool visited();
   void set_layer_or_descendant_is_drawn(bool layer_or_descendant_is_drawn);
   bool layer_or_descendant_is_drawn();
   void set_sorted_for_recursion(bool sorted_for_recursion);
   bool sorted_for_recursion();
-  void set_is_hidden_from_property_trees(bool is_hidden) {
-    if (is_hidden == is_hidden_from_property_trees_)
-      return;
-    is_hidden_from_property_trees_ = is_hidden;
-    SetNeedsPushProperties();
-  }
 
   // LayerAnimationValueProvider implementation.
   gfx::ScrollOffset ScrollOffsetForAnimation() const override;
 
   // LayerAnimationValueObserver implementation.
   void OnFilterAnimated(const FilterOperations& filters) override;
   void OnOpacityAnimated(float opacity) override;
   void OnTransformAnimated(const gfx::Transform& transform) override;
   void OnScrollOffsetAnimated(const gfx::ScrollOffset& scroll_offset) override;
   void OnAnimationWaitingForDeletion() override;
@@ skipping 206 matching lines @@
 
   PaintProperties paint_properties_;
 
   // These all act like draw properties, so don't need push properties.
   gfx::Rect visible_layer_rect_;
   gfx::Rect clip_rect_;
   size_t num_unclipped_descendants_;
 
   std::vector<FrameTimingRequest> frame_timing_requests_;
   bool frame_timing_requests_dirty_;
-  bool is_hidden_from_property_trees_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_H_