cc : Move LayerImpl::parent to test properties

cc/layers/layer_impl.h

 // Copyright 2011 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_IMPL_H_
 #define CC_LAYERS_LAYER_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 84 matching lines @@
   void OnOpacityAnimated(float opacity);
   void OnTransformAnimated(const gfx::Transform& transform);
   void OnScrollOffsetAnimated(const gfx::ScrollOffset& scroll_offset);
   void OnTransformIsCurrentlyAnimatingChanged(bool is_currently_animating);
   void OnTransformIsPotentiallyAnimatingChanged(bool has_potential_animation);
   void OnOpacityIsCurrentlyAnimatingChanged(bool is_currently_animating);
   void OnOpacityIsPotentiallyAnimatingChanged(bool has_potential_animation);
   bool IsActive() const;
 
   // Tree structure.
-  LayerImpl* parent() { return parent_; }
   void AddChild(std::unique_ptr<LayerImpl> child);
   std::unique_ptr<LayerImpl> RemoveChildForTesting(LayerImpl* child);
-  void SetParent(LayerImpl* parent);
 
   void DistributeScroll(ScrollState* scroll_state);
   void ApplyScroll(ScrollState* scroll_state);
 
   void set_property_tree_sequence_number(int sequence_number) {}
 
   void SetTransformTreeIndex(int index);
   int transform_tree_index() const { return transform_tree_index_; }
 
   void SetClipTreeIndex(int index);
@@ skipping 408 matching lines @@
                              SkColor color,
                              float width) const;
 
   gfx::Rect GetScaledEnclosingRectInTargetSpace(float scale) const;
 
  private:
   void ValidateQuadResourcesInternal(DrawQuad* quad) const;
 
   virtual const char* LayerTypeAsString() const;
 
-  // Properties internal to LayerImpl
-  LayerImpl* parent_;
-
   // mask_layer_ can be temporarily stolen during tree sync, we need this ID to
   // confirm newly assigned layer is still the previous one
   int mask_layer_id_;
   LayerImpl* mask_layer_;
   int replica_layer_id_;  // ditto
   LayerImpl* replica_layer_;
   int layer_id_;
   LayerTreeImpl* layer_tree_impl_;
 
   std::unique_ptr<LayerImplTestProperties> test_properties_;
@@ skipping 83 matching lines @@
 
   bool scrolls_drawn_descendant_;
   bool has_will_change_transform_hint_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_