cc: Clean up transform tree

cc/trees/property_tree.h

 // Copyright 2014 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_TREES_PROPERTY_TREE_H_
 #define CC_TREES_PROPERTY_TREE_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 150 matching lines @@
 
   // Computes the change of basis transform from node |source_id| to |dest_id|.
   // The function returns false iff the inverse of a singular transform was
   // used (and the result should, therefore, not be trusted). Transforms may
   // be computed between any pair of nodes that have an ancestor/descendant
   // relationship. Transforms between other pairs of nodes may only be computed
   // if the following condition holds: let id1 the larger id and let id2 be the
   // other id; then the nearest ancestor of node id1 whose id is smaller than
   // id2 is the lowest common ancestor of the pair of nodes, and the transform
   // from this lowest common ancestor to node id2 is only a 2d translation.
-  bool ComputeTransform(int source_id,
-                        int dest_id,
-                        gfx::Transform* transform) const;
+  bool ComputeTransformForTesting(int source_id,
+                                  int dest_id,
+                                  gfx::Transform* transform) const;
 
   void OnTransformAnimated(const gfx::Transform& transform,
                            int id,
                            LayerTreeImpl* layer_tree_impl);
   // Computes the change of basis transform from node |source_id| to |dest_id|.
   // This is used by scroll children to compute transform from their scroll
   // parent space (source) to their parent space (destination) and it can atmost
   // be a translation. This function assumes that the path from source to
   // destination has only translations. So, it should not be called when there
   // can be intermediate 3d transforms but the end result is a translation.
@@ skipping 61 matching lines @@
 
   const std::vector<int>& nodes_affected_by_inner_viewport_bounds_delta()
       const {
     return nodes_affected_by_inner_viewport_bounds_delta_;
   }
   const std::vector<int>& nodes_affected_by_outer_viewport_bounds_delta()
       const {
     return nodes_affected_by_outer_viewport_bounds_delta_;
   }
 
-  gfx::Transform FromTarget(int node_id, int effect) const;
-  void SetFromTarget(int node_id, const gfx::Transform& transform);
-
-  // TODO(sunxd): Remove target space transforms in cached data when we
-  // completely implement computing draw transforms on demand.
-  gfx::Transform ToTarget(int node_id, int effect_id) const;
-  void SetToTarget(int node_id, const gfx::Transform& transform);
-
   const gfx::Transform& FromScreen(int node_id) const;
   void SetFromScreen(int node_id, const gfx::Transform& transform);
 
   const gfx::Transform& ToScreen(int node_id) const;
   void SetToScreen(int node_id, const gfx::Transform& transform);
 
   int TargetId(int node_id) const;
   void SetTargetId(int node_id, int target_id);
 
   int ContentTargetId(int node_id) const;
@@ skipping 24 matching lines @@
 
  private:
   // Returns true iff the node at |desc_id| is a descendant of the node at
   // |anc_id|.
   bool IsDescendant(int desc_id, int anc_id) const;
 
   void UpdateLocalTransform(TransformNode* node);
   void UpdateScreenSpaceTransform(TransformNode* node,
                                   TransformNode* parent_node,
                                   TransformNode* target_node);
-  void UpdateSurfaceContentsScale(TransformNode* node);
-  void UpdateTargetSpaceTransform(TransformNode* node,
-                                  TransformNode* target_node);
   void UpdateAnimationProperties(TransformNode* node,
                                  TransformNode* parent_node);
   void UndoSnapping(TransformNode* node);
   void UpdateSnapping(TransformNode* node);
   void UpdateNodeAndAncestorsHaveIntegerTranslations(
       TransformNode* node,
       TransformNode* parent_node);
   bool NeedsSourceToParentUpdate(TransformNode* node);
   void SetContentsRootPostLocalTransform(const gfx::Transform& transform,
                                          gfx::PointF root_position);
@@ skipping 330 matching lines @@
                    gfx::Transform* to_target) const;
   bool GetFromTarget(int transform_id,
                      int effect_id,
                      gfx::Transform* from_target) const;
 
   void ResetCachedData();
   void UpdateCachedNumber();
   gfx::Transform ToScreenSpaceTransformWithoutSurfaceContentsScale(
       int transform_id,
       int effect_id) const;
-  bool ComputeTransformToTarget(int transform_id,
-                                int effect_id,
-                                gfx::Transform* transform) const;
 
   bool ComputeTransformFromTarget(int transform_id,
                                   int effect_id,
                                   gfx::Transform* transform) const;
 
  private:
   gfx::Vector2dF inner_viewport_container_bounds_delta_;
   gfx::Vector2dF outer_viewport_container_bounds_delta_;
   gfx::Vector2dF inner_viewport_scroll_bounds_delta_;
 
   // GetDrawTransforms may change the value of cached_data_.
   DrawTransforms& GetDrawTransforms(int transform_id, int effect_id) const;
   DrawTransformData& FetchDrawTransformsDataFromCache(int transform_id,
                                                       int effect_id) const;
 
   PropertyTreesCachedData cached_data_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_PROPERTY_TREE_H_