Initialize the message center as part of the testing browser process

chrome/browser/background/background_mode_manager_unittest.cc

 // Copyright (c) 2011 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/background/background_mode_manager.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
@@ skipping 210 matching lines @@
 class BackgroundModeManagerWithExtensionsTest : public testing::Test {
  public:
   BackgroundModeManagerWithExtensionsTest() {}
   ~BackgroundModeManagerWithExtensionsTest() override {}
 
   void SetUp() override {
     command_line_.reset(new base::CommandLine(base::CommandLine::NO_PROGRAM));
     profile_manager_ = CreateTestingProfileManager();
     profile_ = profile_manager_->CreateTestingProfile("p1");
 
-    // Aura clears notifications from the message center at shutdown.
-    message_center::MessageCenter::Initialize();
-
     test_keep_alive_.reset(
         new ScopedKeepAlive(KeepAliveOrigin::BACKGROUND_MODE_MANAGER,
                             KeepAliveRestartOption::DISABLED));
 
     // Create our test BackgroundModeManager.
     manager_.reset(new TestBackgroundModeManager(
         *command_line_, profile_manager_->profile_attributes_storage()));
     manager_->RegisterProfile(profile_);
   }
 
@@ skipping 25 matching lines @@
     // cleared without having |manager_| attempt to perform optimizations.
     test_keep_alive_.reset();
 
     // The Profile Manager references the Browser Process.
     // The Browser Process references the Notification UI Manager.
     // The Notification UI Manager references the Message Center.
     // As a result, we have to clear the browser process state here
     // before tearing down the Message Center.
     profile_manager_.reset();
 
-    // Message Center shutdown must occur after the KeepAlive is released
-    // because clearing it will end up referencing the message center.
-    message_center::MessageCenter::Shutdown();
-
     // Clear the shutdown flag to isolate the remaining effect of this test.
     browser_shutdown::SetTryingToQuit(false);
   }
 
  protected:
   scoped_refptr<extensions::Extension> CreateExtension(
       extensions::Manifest::Location location,
       const std::string& data,
       const std::string& id) {
     std::unique_ptr<base::DictionaryValue> parsed_manifest(
@@ skipping 728 matching lines @@
   // When the background mode pref is enabled and there are pending triggers
   // they will be registered and the user will be notified.
   EXPECT_CALL(manager, EnableLaunchOnStartup(true));
   g_browser_process->local_state()->SetBoolean(prefs::kBackgroundModeEnabled,
                                                true);
   Mock::VerifyAndClearExpectations(&manager);
   ASSERT_EQ(1, manager.GetBackgroundClientCountForProfile(profile_));
   AssertBackgroundModeActive(manager);
   ASSERT_TRUE(manager.HasShownBalloon());
 }