Use TaskScheduler instead of WorkerPool in arc_notification_item.cc.

ui/arc/notification/arc_notification_item.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 "ui/arc/notification/arc_notification_item.h"
 
 #include <algorithm>
 #include <utility>
 #include <vector>
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/task_runner.h"
-#include "base/task_runner_util.h"
-#include "base/threading/worker_pool.h"
+#include "base/task_scheduler/post_task.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "ui/gfx/codec/png_codec.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/text_elider.h"
 #include "ui/message_center/message_center_style.h"
 #include "ui/message_center/notification.h"
 #include "ui/message_center/notification_types.h"
 #include "ui/message_center/notifier_settings.h"
 
 namespace arc {
 
 namespace {
 
 constexpr char kNotifierId[] = "ARC_NOTIFICATION";
 constexpr char kNotificationIdPrefix[] = "ARC_NOTIFICATION_";
 
 SkBitmap DecodeImage(const std::vector<uint8_t>& data) {
-  DCHECK(base::WorkerPool::RunsTasksOnCurrentThread());
   DCHECK(!data.empty());  // empty string should be handled in caller.
 
   // We may decode an image in the browser process since it has been generated
   // in NotificationListerService in Android and should be safe.
   SkBitmap bitmap;
   gfx::PNGCodec::Decode(&data[0], data.size(), &bitmap);
   return bitmap;
 }
 
 // Crops the image to proper size for Chrome Notification. It accepts only
@@ skipping 183 matching lines @@
       GURL(),                    // empty origin url, for system component
       notifier_id, rich_data,
       new ArcNotificationDelegate(weak_ptr_factory_.GetWeakPtr())));
 
   if (data->icon_data.size() == 0) {
     OnImageDecoded(SkBitmap());  // Pass an empty bitmap.
     return;
   }
 
   // TODO(yoshiki): Remove decoding by passing a bitmap directly from Android.
-  base::PostTaskAndReplyWithResult(
-      base::WorkerPool::GetTaskRunner(true).get(), FROM_HERE,
+  base::PostTaskWithTraitsAndReplyWithResult(
+      FROM_HERE, base::TaskTraits().WithShutdownBehavior(
+                     base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN),
       base::Bind(&DecodeImage, data->icon_data),
       base::Bind(&ArcNotificationItem::OnImageDecoded,
                  weak_ptr_factory_.GetWeakPtr()));
 }
 
 ArcNotificationItem::~ArcNotificationItem() {}
 
 void ArcNotificationItem::OnClosedFromAndroid() {
   being_removed_by_manager_ = true;  // Closing is initiated by the manager.
   message_center_->RemoveNotification(notification_id_, false /* by_user */);
@@ skipping 74 matching lines @@
 
 void ArcNotificationItem::OnImageDecoded(const SkBitmap& bitmap) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   gfx::Image image = gfx::Image::CreateFrom1xBitmap(bitmap);
   notification_->set_icon(image);
   AddToMessageCenter();
 }
 
 }  // namespace arc