Delay activation/draw on GPU tile work completion

cc/tiles/picture_layer_tiling.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_PICTURE_LAYER_TILING_H_
 #define CC_TILES_PICTURE_LAYER_TILING_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 230 matching lines @@
       const gfx::Rect& soon_border_rect_in_layer_space,
       const gfx::Rect& eventually_rect_in_layer_space,
       float ideal_contents_scale,
       const Occlusion& occlusion_in_layer_space);
 
   void GetAllPrioritizedTilesForTracing(
       std::vector<PrioritizedTile>* prioritized_tiles) const;
   void AsValueInto(base::trace_event::TracedValue* array) const;
   size_t GPUMemoryUsageInBytes() const;
 
+  void UpdateRequiredStatesOnTile(Tile* tile) const;
+
  protected:
   friend class CoverageIterator;
   friend class PrioritizedTile;
   friend class TilingSetRasterQueueAll;
   friend class TilingSetRasterQueueRequired;
   friend class TilingSetEvictionQueue;
 
   // PENDING VISIBLE RECT refers to the visible rect that will become current
   // upon activation (ie, the pending tree's visible rect). Tiles in this
   // region that are not part of the current visible rect are all handled
@@ skipping 22 matching lines @@
                             const gfx::Rect& visible_rect_in_content_space,
                             const gfx::Rect& skewport,
                             const gfx::Rect& soon_border_rect,
                             const gfx::Rect& eventually_rect,
                             const Occlusion& occlusion_in_layer_space);
 
   bool IsTileOccludedOnCurrentTree(const Tile* tile) const;
   Tile::CreateInfo CreateInfoForTile(int i, int j) const;
   bool ShouldCreateTileAt(const Tile::CreateInfo& info) const;
   bool IsTileOccluded(const Tile* tile) const;
-  void UpdateRequiredStatesOnTile(Tile* tile) const;
   PrioritizedTile MakePrioritizedTile(
       Tile* tile,
       PriorityRectType priority_rect_type) const;
   TilePriority ComputePriorityForTile(
       const Tile* tile,
       PriorityRectType priority_rect_type) const;
   PriorityRectType ComputePriorityRectTypeForTile(const Tile* tile) const;
   bool has_visible_rect_tiles() const { return has_visible_rect_tiles_; }
   bool has_skewport_rect_tiles() const { return has_skewport_rect_tiles_; }
   bool has_soon_border_rect_tiles() const {
@@ skipping 56 matching lines @@
   bool has_eventually_rect_tiles_ = false;
   bool all_tiles_done_ = true;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PictureLayerTiling);
 };
 
 }  // namespace cc
 
 #endif  // CC_TILES_PICTURE_LAYER_TILING_H_