Rename cc property tree node owner_id to owning_layer_id.

cc/trees/clip_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_CLIP_NODE_H_
 #define CC_TREES_CLIP_NODE_H_
 
 #include "cc/base/cc_export.h"
 #include "ui/gfx/geometry/rect_f.h"
 
 namespace base {
 namespace trace_event {
 class TracedValue;
 }  // namespace trace_event
 }  // namespace base
 
 namespace cc {
 
 struct CC_EXPORT ClipNode {
   ClipNode();
   ClipNode(const ClipNode& other);
 
+  // The node index of this node in the clip tree node vector.
   int id;
+  // The node index of the parent node in the clip tree node vector.
   int parent_id;
-  int owner_id;
+  // The layer id of the layer that owns this node.
+  int owning_layer_id;
 
   enum class ClipType {
     // The node doesn't contribute a new clip. It exists only for caching clips
     // or for resetting clipping state.
     NONE,
 
     // The node contributes a new clip (that is, |clip| needs to be applied).
     APPLIES_LOCAL_CLIP
   };
 
@@ skipping 41 matching lines @@
   bool resets_clip : 1;
 
   bool operator==(const ClipNode& other) const;
 
   void AsValueInto(base::trace_event::TracedValue* value) const;
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_CLIP_NODE_H_