cc: Plumb more details about pixel refs to tile manager.

cc/tiles/image_decode_controller.h

 // Copyright 2015 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_IMAGE_DECODE_CONTROLLER_H_
 #define CC_TILES_IMAGE_DECODE_CONTROLLER_H_
 
 #include "base/containers/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "cc/base/cc_export.h"
 #include "cc/raster/tile_task_runner.h"
+#include "skia/ext/pixel_ref_utils.h"
 #include "skia/ext/refptr.h"
 #include "third_party/skia/include/core/SkPixelRef.h"
 
 namespace cc {
 
 class ImageDecodeController {
  public:
   ImageDecodeController();
   ~ImageDecodeController();
 
-  scoped_refptr<ImageDecodeTask> GetTaskForPixelRef(SkPixelRef* pixel_ref,
-                                                    int layer_id,
-                                                    uint64_t prepare_tiles_id);
+  scoped_refptr<ImageDecodeTask> GetTaskForPixelRef(
+      const skia::PositionPixelRef& pixel_ref,
+      int layer_id,
+      uint64_t prepare_tiles_id);
 
   // Note that this function has to remain thread safe.
   void DecodePixelRef(SkPixelRef* pixel_ref);
 
   // TODO(vmpstr): This should go away once the controller is decoding images
   // based on priority and memory.
   void AddLayerUsedCount(int layer_id);
   void SubtractLayerUsedCount(int layer_id);
 
   void OnImageDecodeTaskCompleted(int layer_id,
@@ skipping 11 matching lines @@
   using LayerPixelRefTaskMap = base::hash_map<int, PixelRefTaskMap>;
   LayerPixelRefTaskMap image_decode_tasks_;
 
   using LayerCountMap = base::hash_map<int, int>;
   LayerCountMap used_layer_counts_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TILES_IMAGE_DECODE_CONTROLLER_H_