Rename cc property tree node owner_id to owning_layer_id.

cc/trees/transform_node.h

 // Copyright 2016 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_TRANSFORM_NODE_H_
 #define CC_TREES_TRANSFORM_NODE_H_
 
 #include "cc/base/cc_export.h"
 #include "ui/gfx/geometry/point_f.h"
 #include "ui/gfx/geometry/scroll_offset.h"
 #include "ui/gfx/transform.h"
 
 namespace base {
 namespace trace_event {
 class TracedValue;
 }  // namespace trace_event
 }  // namespace base
 
 namespace cc {
 
 struct CC_EXPORT TransformNode {
   TransformNode();
   TransformNode(const TransformNode&);
 
+  // The node index of this node in the transform tree node vector.
   int id;
+  // The node index of the parent node in the transform tree node vector.
   int parent_id;
-  int owner_id;
+  // The layer id of the layer that owns this node.
+  int owning_layer_id;
 
   // The local transform information is combined to form to_parent (ignoring
   // snapping) as follows:
   //
   //   to_parent = M_post_local * T_scroll * M_local * M_pre_local.
   //
   // The pre/post may seem odd when read LTR, but we multiply our points from
   // the right, so the pre_local matrix affects the result "first". This lines
   // up with the notions of pre/post used in skia and gfx::Transform.
   //
@@ skipping 113 matching lines @@
   int content_target_id;
 
   bool is_showing_backface : 1;
 
   bool operator==(const TransformCachedNodeData& other) const;
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_TRANSFORM_NODE_H_