[Notification] Make HTML5 Notification use ActionCenter on Windows 10, behind Flags.

chrome/browser/browser_process_impl.cc

 // Copyright (c) 2012 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/browser_process_impl.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <map>
@@ skipping 293 matching lines @@
   // that URLFetcher operation before going away.)
   metrics_services_manager_.reset();
   intranet_redirect_detector_.reset();
   if (safe_browsing_service_.get())
     safe_browsing_service()->ShutDown();
   network_time_tracker_.reset();
 #if BUILDFLAG(ENABLE_PLUGINS)
   plugins_resource_service_.reset();
 #endif
 
+  // Clear notification bridge explicitly, since it may consume resources for
+  // notifications that haven't been shown. For example, on Windows 10 we'd use
+  // store temporary images files.
+  notification_bridge_.reset();
+
   // Need to clear the desktop notification balloons before the io_thread_ and
   // before the profiles, since if there are any still showing we will access
   // those things during teardown.
   notification_ui_manager_.reset();
 
   // The SupervisedUserWhitelistInstaller observes the ProfileAttributesStorage,
   // so it needs to be shut down before the ProfileManager.
   supervised_user_whitelist_installer_.reset();
 
   // Debugger must be cleaned up before ProfileManager.
@@ skipping 1103 matching lines @@
 }
 
 void BrowserProcessImpl::OnAutoupdateTimer() {
   if (CanAutorestartForUpdate()) {
     DLOG(WARNING) << "Detected update.  Restarting browser.";
     RestartBackgroundInstance();
   }
 }
 
 #endif  // (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)