cc: Optimize decode scheduling for checker-images.

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 264 matching lines @@
     ~PrioritizedWorkToSchedule();
 
     std::vector<PrioritizedTile> tiles_to_raster;
     std::vector<PrioritizedTile> tiles_to_process_for_images;
   };
 
   void FreeResourcesForTile(Tile* tile);
   void FreeResourcesForTileAndNotifyClientIfTileWasReadyToDraw(Tile* tile);
   scoped_refptr<TileTask> CreateRasterTask(
       const PrioritizedTile& prioritized_tile,
-      const gfx::ColorSpace& color_space);
+      const gfx::ColorSpace& color_space,
+      CheckerImageTracker::ImageDecodeQueue* checker_image_decode_queue);
 
   std::unique_ptr<EvictionTilePriorityQueue>
   FreeTileResourcesUntilUsageIsWithinLimit(
       std::unique_ptr<EvictionTilePriorityQueue> eviction_priority_queue,
       const MemoryUsage& limit,
       MemoryUsage* usage);
   std::unique_ptr<EvictionTilePriorityQueue>
   FreeTileResourcesWithLowerPriorityUntilUsageIsWithinLimit(
       std::unique_ptr<EvictionTilePriorityQueue> eviction_priority_queue,
       const MemoryUsage& limit,
@@ skipping 18 matching lines @@
   PrioritizedWorkToSchedule AssignGpuMemoryToTiles();
   void ScheduleTasks(const PrioritizedWorkToSchedule& work_to_schedule);
 
   std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
   ScheduledTasksStateAsValue() const;
 
   bool UsePartialRaster() const;
 
   void CheckPendingGpuWorkTiles(bool issue_signals);
 
+  void FilterImagesForCheckering(

[vmpstr, 2017/03/17 18:32:13]

Can you add tests for this function?

+      const PrioritizedTile& prioritized_tile,
+      std::vector<DrawImage>* images_to_decode,
+      ImageIdFlatSet* checker_images,
+      CheckerImageTracker::ImageDecodeQueue* checker_image_decode_queue);
+
   TileManagerClient* client_;
   base::SequencedTaskRunner* task_runner_;
   ResourcePool* resource_pool_;
   std::unique_ptr<TileTaskManager> tile_task_manager_;
   RasterBufferProvider* raster_buffer_provider_;
   GlobalStateThatImpactsTilePriority global_state_;
   size_t scheduled_raster_task_limit_;
 
   const TileManagerSettings tile_manager_settings_;
   bool use_gpu_rasterization_;
@@ skipping 41 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_