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

cc/tiles/checker_image_tracker_unittest.cc

 // Copyright 2017 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.
 
 #include "cc/tiles/checker_image_tracker.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 30 matching lines @@
     ImageDecodeRequestId request_id = next_image_request_id_++;
 
     // The tracker should request a decode only once.
     EXPECT_EQ(decodes_requested_.count(image->uniqueID()), 0u);
     decodes_requested_.insert(image->uniqueID());
 
     locked_images_.insert(request_id);
 
     // Post the callback asynchronously to match the behaviour in
     // ImageController.
-    worker_task_runner_->PostTask(FROM_HERE, base::Bind(callback, request_id));
+    worker_task_runner_->PostTask(
+        FROM_HERE,
+        base::Bind(callback, request_id, ImageDecodeResult::SUCCESS));
 
     return request_id;
   }
 
  private:
   ImageDecodeRequestId next_image_request_id_ = 1U;
   std::unordered_set<ImageDecodeRequestId> locked_images_;
   ImageIdFlatSet decodes_requested_;
 };
 
@@ skipping 225 matching lines @@
   checkered_images.clear();
   draw_images.push_back(checkerable_image1);
   checker_image_tracker_->FilterImagesForCheckeringForTile(
       &draw_images, &checkered_images, WhichTree::ACTIVE_TREE);
   EXPECT_EQ(draw_images.size(), 1U);
   EXPECT_EQ(checkered_images.size(), 0U);
 }
 
 }  // namespace
 }  // namespace cc