cc: Merge TileTaskRunner to TileTaskWorkerPool.

cc/tiles/gpu_image_decode_controller_unittest.cc

 // 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.
 
 #include "cc/tiles/gpu_image_decode_controller.h"
 
 #include "cc/playback/draw_image.h"
-#include "cc/raster/tile_task_runner.h"
+#include "cc/raster/tile_task.h"
 #include "cc/test/test_context_provider.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
 namespace {
 
 skia::RefPtr<SkImage> CreateImage(int width, int height) {
   SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);
   SkBitmap bitmap;
   bitmap.allocPixels(info);
@@ skipping 579 matching lines @@
   ProcessTask(task->dependencies()[0].get());
   ProcessTask(task.get());
 
   // The image should be in our cache after un-ref.
   controller.UnrefImage(draw_image);
   DCHECK_GT(controller.GetBytesUsedForTesting(), 0u);
 }
 
 }  // namespace
 }  // namespace cc