cc: Clear checker-image tracking on navigation and visibility changes.

cc/tiles/tile_manager.h

 // Copyright 2012 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_TILES_TILE_MANAGER_H_
 #define CC_TILES_TILE_MANAGER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 134 matching lines @@
   std::unique_ptr<Tile> CreateTile(const Tile::CreateInfo& info,
                                    int layer_id,
                                    int source_frame_number,
                                    int flags);
 
   bool IsReadyToActivate() const;
   bool IsReadyToDraw() const;
 
   const ImageIdFlatSet& TakeImagesToInvalidateOnSyncTree();
   void DidActivateSyncTree();
+  void ClearCheckerImageTracking(bool can_clear_decode_policy_tracking);
 
   std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
   BasicStateAsValue() const;
   void BasicStateAsValueInto(base::trace_event::TracedValue* dict) const;
   const MemoryHistory::Entry& memory_stats_from_last_assign() const {
     return memory_stats_from_last_assign_;
   }
 
   // Public methods for testing.
   void InitializeTilesWithResourcesForTesting(const std::vector<Tile*>& tiles) {
@@ skipping 238 matching lines @@
   base::WeakPtrFactory<TileManager> task_set_finished_weak_ptr_factory_;
   // The |ready_to_draw_callback_weak_ptr_factory_| is never invalidated.
   base::WeakPtrFactory<TileManager> ready_to_draw_callback_weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TileManager);
 };
 
 }  // namespace cc
 
 #endif  // CC_TILES_TILE_MANAGER_H_