cc: Remove SetNeedsUpdate function from cc::Layer

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 329 matching lines @@
   // Constructs a LayerImpl of the correct runtime type for this Layer type.
   virtual std::unique_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl);
 
   bool NeedsDisplayForTesting() const { return !inputs_.update_rect.IsEmpty(); }
   void ResetNeedsDisplayForTesting() { inputs_.update_rect = gfx::Rect(); }
 
   const PaintProperties& paint_properties() const {
     return paint_properties_;
   }
 
+  // Mark the layer as needing to push its properties to the LayerImpl during
+  // commit.
   void SetNeedsPushProperties();
   void ResetNeedsPushPropertiesForTesting();
 
   virtual void RunMicroBenchmark(MicroBenchmark* benchmark);
 
   void Set3dSortingContextId(int id);
   int sorting_context_id() const { return inputs_.sorting_context_id; }
 
   void set_property_tree_sequence_number(int sequence_number) {
     property_tree_sequence_number_ = sequence_number;
@@ skipping 40 matching lines @@
   }
   void set_visible_layer_rect(const gfx::Rect& rect) {
     visible_layer_rect_ = rect;
   }
 
   void SetSubtreePropertyChanged();
   bool subtree_property_changed() const { return subtree_property_changed_; }
 
   void SetMayContainVideo(bool yes);
 
-  void DidBeginTracing();
-
   int num_copy_requests_in_target_subtree();
 
   void SetElementId(ElementId id);
   ElementId element_id() const { return inputs_.element_id; }
 
   void SetMutableProperties(uint32_t properties);
   uint32_t mutable_properties() const { return inputs_.mutable_properties; }
 
   bool HasTickingAnimationForTesting() const;
 
@@ skipping 27 matching lines @@
   LayerTreeHost* layer_tree_host() const { return layer_tree_host_; }
 
  protected:
   friend class LayerImpl;
   friend class TreeSynchronizer;
   virtual ~Layer();
   Layer();
 
   // These SetNeeds functions are in order of severity of update:
   //
-  // Called when this layer has been modified in some way, but isn't sure
-  // that it needs a commit yet.  It needs CalcDrawProperties and UpdateLayers
-  // before it knows whether or not a commit is required.
-  void SetNeedsUpdate();
-  // Called when a property has been modified in a way that the layer
-  // knows immediately that a commit is required.  This implies SetNeedsUpdate
-  // as well as SetNeedsPushProperties to push that property.
+  // Called when a property has been modified in a way that the layer knows
+  // immediately that a commit is required.  This implies SetNeedsPushProperties
+  // to push that property.
   void SetNeedsCommit();
   // This is identical to SetNeedsCommit, but the former requests a rebuild of
   // the property trees.
   void SetNeedsCommitNoRebuild();
-  // Called when there's been a change in layer structure.  Implies both
-  // SetNeedsUpdate and SetNeedsCommit, but not SetNeedsPushProperties.
+  // Called when there's been a change in layer structure.  Implies
+  // SetNeedsCommit and property tree rebuld, but not SetNeedsPushProperties
+  // (the full tree is synced over).
   void SetNeedsFullTreeSync();
 
   // Called when the next commit should wait until the pending tree is activated
   // before finishing the commit and unblocking the main thread. Used to ensure
   // unused resources on the impl thread are returned before commit completes.
   void SetNextCommitWaitsForActivation();
 
   // Will recalculate whether the layer draws content and set draws_content_
   // appropriately.
   void UpdateDrawsContent(bool has_drawable_content);
@@ skipping 181 matching lines @@
   // These all act like draw properties, so don't need push properties.
   gfx::Rect visible_layer_rect_;
   size_t num_unclipped_descendants_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_H_