Add KeepAliveStateObserver, add the Restart option

chrome/browser/ui/app_list/profile_loader.cc

 // Copyright 2013 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/ui/app_list/profile_loader.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "chrome/browser/lifetime/keep_alive_types.h"
 #include "chrome/browser/lifetime/scoped_keep_alive.h"
@@ skipping 49 matching lines @@
                                     base::Callback<void(Profile*)> callback,
                                     Profile* profile) {
   DecrementPendingProfileLoads();
   if (profile_load_sequence_id == profile_load_sequence_id_)
     callback.Run(profile);
 }
 
 void ProfileLoader::IncrementPendingProfileLoads() {
   pending_profile_loads_++;
   if (pending_profile_loads_ == 1)
-    keep_alive_.reset(new ScopedKeepAlive(KeepAliveOrigin::PROFILE_LOADER));
+    keep_alive_.reset(new ScopedKeepAlive(KeepAliveOrigin::PROFILE_LOADER,
+                                          KeepAliveRestartOption::DISABLED));
 }
 
 void ProfileLoader::DecrementPendingProfileLoads() {
   pending_profile_loads_--;
   if (pending_profile_loads_ == 0)
     keep_alive_.reset();
 }