cc: Make image controller return a status with the callback.

cc/tiles/decoded_image_tracker.h

 // Copyright 2016 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_DECODED_IMAGE_TRACKER_H_
 #define CC_TILES_DECODED_IMAGE_TRACKER_H_
 
 #include <utility>
 #include <vector>
 
@@ skipping 12 matching lines @@
 // Note that it is safe to replace ImageController's cache without doing
 // anything special with this class, since it retains only ids to the decode
 // requests. When defunct ids are then used to try and unlock the image, they
 // are silently ignored.
 class CC_EXPORT DecodedImageTracker {
  public:
   DecodedImageTracker();
   ~DecodedImageTracker();
 
   void QueueImageDecode(sk_sp<const SkImage> image,
-                        const base::Closure& callback);
+                        const base::Callback<void(bool)>& callback);

[Khushal, 2017/02/17 23:56:38]

Add a comment about what the bool in the callback signifies?

[vmpstr, 2017/02/24 02:43:49]

Done.

   void NotifyFrameFinished();
 
  private:
   friend class TileManager;
   friend class DecodedImageTrackerTest;
 
   void set_image_controller(ImageController* controller) {
     image_controller_ = controller;
   }
 
-  void ImageDecodeFinished(const base::Closure& callback,
-                           ImageController::ImageDecodeRequestId id);
+  void ImageDecodeFinished(const base::Callback<void(bool)>& callback,
+                           ImageController::ImageDecodeRequestId id,
+                           ImageController::ImageDecodeResult result);
 
   ImageController* image_controller_ = nullptr;
   std::vector<std::pair<ImageController::ImageDecodeRequestId, int>>
       locked_images_;
 
   DISALLOW_COPY_AND_ASSIGN(DecodedImageTracker);
 };
 
 }  // namespace cc
 
 #endif  // CC_TILES_DECODED_IMAGE_TRACKER_H_