cc: Remove SetNeedsUpdate function from cc::Layer

cc/trees/layer_tree_host.h

Index: cc/trees/layer_tree_host.h
diff --git a/cc/trees/layer_tree_host.h b/cc/trees/layer_tree_host.h
index 4661d9816cdb894fba47df14b1f6df27a3a9d6a5..2b33aac3bcc2eabdc0ed57bbea7dfba721e6eade 100644
--- a/cc/trees/layer_tree_host.h
+++ b/cc/trees/layer_tree_host.h
@@ -322,7 +322,8 @@ class CC_EXPORT LayerTreeHost : public NON_EXPORTED_BASE(SurfaceReferenceOwner),
 
   size_t NumLayers() const;
 
-  bool UpdateLayers(const LayerList& update_layer_list,
+  bool in_update_property_trees() const { return in_update_property_trees_; }
+  bool PaintContent(const LayerList& update_layer_list,
                     bool* content_is_suitable_for_gpu);
   bool in_paint_layer_contents() const { return in_paint_layer_contents_; }
 
@@ -594,6 +595,7 @@ class CC_EXPORT LayerTreeHost : public NON_EXPORTED_BASE(SurfaceReferenceOwner),
   std::unordered_map<ElementId, Layer*, ElementIdHash> element_layers_map_;
 
   bool in_paint_layer_contents_ = false;
+  bool in_update_property_trees_ = false;
 
   MutatorHost* mutator_host_;