Rebuild PropertyTrees When Layer Attach to New LayerTreeHost

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 <set>
 #include <string>
 #include <vector>
@@ skipping 678 matching lines @@
   bool IsActive() const override;
 
   // If this layer has a scroll parent, it removes |this| from its list of
   // scroll children.
   void RemoveFromScrollTree();
 
   // If this layer has a clip parent, it removes |this| from its list of clip
   // children.
   void RemoveFromClipTree();
 
+  // When we detach or attach layer to new LayerTreeHost, all property trees'
+  // indices becomes invalid.
+  void InvalidatePropertyTreesIndices();
+
   void UpdateNumCopyRequestsForSubtree(bool add);
   void UpdateNumInputHandlersForSubtree(bool add);
 
   LayerList children_;
   Layer* parent_;
 
   // Layer instances have a weak pointer to their LayerTreeHost.
   // This pointer value is nil when a Layer is not in a tree and is
   // updated via SetLayerTreeHost() if a layer moves between trees.
   LayerTreeHost* layer_tree_host_;
@@ skipping 88 matching lines @@
 
   std::vector<FrameTimingRequest> frame_timing_requests_;
   bool frame_timing_requests_dirty_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_H_