Initialize the message center as part of the testing browser process

chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl_unittest.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/ash/launcher/chrome_launcher_controller_impl.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <map>
@@ skipping 1070 matching lines @@
     // Get some base objects.
     ash::test::AshTestHelper::GetTestSessionStateDelegate()
         ->set_logged_in_users(2);
     shell_delegate_ = static_cast<ash::test::TestShellDelegate*>(
         ash::WmShell::Get()->delegate());
     shell_delegate_->set_multi_profiles_enabled(true);
   }
 
   void TearDown() override {
     ChromeLauncherControllerImplTest::TearDown();
-    user_manager_enabler_.reset();
     for (ProfileToNameMap::iterator it = created_profiles_.begin();
          it != created_profiles_.end(); ++it)
       profile_manager_->DeleteTestingProfile(it->second);
     chromeos::WallpaperManager::Shutdown();
+    user_manager_enabler_.reset();
 
     // A Task is leaked if we don't destroy everything, then run the message
     // loop.
     base::RunLoop().RunUntilIdle();
   }
 
   // Creates a profile for a given |user_name|. Note that this class will keep
   // the ownership of the created object.
   TestingProfile* CreateMultiUserProfile(const std::string& user_name) {
     const std::string email_string = user_name + "@example.com";
@@ skipping 2924 matching lines @@
 
   // Pinned state should not change.
   EXPECT_EQ("AppList, Chrome, App1, App2", GetPinnedAppStatus());
   launcher_controller_->UnpinAppWithID(extension2_->id());
   EXPECT_EQ("AppList, Chrome, App1", GetPinnedAppStatus());
 
   // Resume syncing and sync information overrides local copy.
   StartAppSyncService(copy_sync_list);
   EXPECT_EQ("AppList, Chrome, App1, App2", GetPinnedAppStatus());
 }