Remove use of deprecated MessageLoop methods in chrome/.

chrome/browser/download/notification/download_notification_manager.cc

 // 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.
 
 #include "chrome/browser/download/notification/download_notification_manager.h"
 
 #include "base/command_line.h"
+#include "base/location.h"
+#include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/download/download_item_model.h"
 #include "chrome/browser/download/notification/download_item_notification.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/grit/chromium_strings.h"
 #include "content/public/browser/download_item.h"
 #include "grit/theme_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/message_center/message_center.h"
@@ skipping 15 matching lines @@
 }
 
 DownloadNotificationManager::~DownloadNotificationManager() {
 }
 
 void DownloadNotificationManager::OnAllDownloadsRemoving(Profile* profile) {
   DownloadNotificationManagerForProfile* manager_for_profile =
       manager_for_profile_[profile];
   manager_for_profile_.erase(profile);
 
-  base::MessageLoop::current()->DeleteSoon(FROM_HERE, manager_for_profile);
+  base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE,
+                                                  manager_for_profile);
 }
 
 void DownloadNotificationManager::OnNewDownloadReady(
     content::DownloadItem* download) {
   Profile* profile = Profile::FromBrowserContext(download->GetBrowserContext());
 
   if (manager_for_profile_.find(profile) == manager_for_profile_.end()) {
     manager_for_profile_[profile] =
         new DownloadNotificationManagerForProfile(profile, this);
   }
@@ skipping 45 matching lines @@
   DownloadItemNotification* item = items_[download];
   items_.erase(download);
 
   download->RemoveObserver(this);
 
   // notify
   item->OnDownloadRemoved(download);
 
   // This removing might be initiated from DownloadNotificationItem, so delaying
   // deleting for item to do remaining cleanups.
-  base::MessageLoop::current()->DeleteSoon(FROM_HERE, item);
+  base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, item);
 
   if (items_.size() == 0 && parent_manager_)
     parent_manager_->OnAllDownloadsRemoving(profile_);
 }
 
 void DownloadNotificationManagerForProfile::OnDownloadDestroyed(
     content::DownloadItem* download) {
   // Do nothing. Cleanup is done in OnDownloadRemoved().
   DownloadItemNotification* item = items_[download];
   items_.erase(download);
 
   item->OnDownloadRemoved(download);
 
   // This removing might be initiated from DownloadNotificationItem, so delaying
   // deleting for item to do remaining cleanups.
-  base::MessageLoop::current()->DeleteSoon(FROM_HERE, item);
+  base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, item);
 
   if (items_.size() == 0 && parent_manager_)
     parent_manager_->OnAllDownloadsRemoving(profile_);
 }
 
 void DownloadNotificationManagerForProfile::OnNewDownloadReady(
     content::DownloadItem* download) {
   DCHECK_EQ(profile_,
             Profile::FromBrowserContext(download->GetBrowserContext()));
 
   download->AddObserver(this);
 
   for (auto& item : items_) {
     content::DownloadItem* download_item = item.first;
     DownloadItemNotification* download_notification = item.second;
     if (download_item->GetState() == content::DownloadItem::IN_PROGRESS)
       download_notification->DisablePopup();
   }
 
   DownloadItemNotification* item = new DownloadItemNotification(download, this);
   items_.insert(std::make_pair(download, item));
 }
 
 void DownloadNotificationManagerForProfile::OverrideMessageCenterForTest(
     message_center::MessageCenter* message_center) {
   DCHECK(message_center);
   message_center_ = message_center;
 }