Compute if a layer is drawn without LayerTree hierarchy

cc/layers/layer.h

Index: cc/layers/layer.h
diff --git a/cc/layers/layer.h b/cc/layers/layer.h
index aff32fa02772b336f335d39ac743d243240d8719..6c57fc66f55cdeda0adf0dfc9f2555aaa16ac72d 100644
--- a/cc/layers/layer.h
+++ b/cc/layers/layer.h
@@ -141,6 +141,7 @@ class CC_EXPORT Layer : public base::RefCounted<Layer>,
 
   void SetOpacity(float opacity);
   float opacity() const { return opacity_; }
+  float EffectiveOpacity() const;
   bool OpacityIsAnimating() const;
   bool HasPotentiallyRunningOpacityAnimation() const;
   virtual bool OpacityCanAnimateOnImplThread() const;
@@ -561,12 +562,6 @@ class CC_EXPORT Layer : public base::RefCounted<Layer>,
   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;
@@ -793,7 +788,6 @@ class CC_EXPORT Layer : public base::RefCounted<Layer>,
 
   std::vector<FrameTimingRequest> frame_timing_requests_;
   bool frame_timing_requests_dirty_;
-  bool is_hidden_from_property_trees_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };