Initialize the message center as part of the testing browser process

chrome/browser/chromeos/net/network_state_notifier_unittest.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/chromeos/net/network_state_notifier.h"
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/run_loop.h"
@@ skipping 48 matching lines @@
  public:
   NetworkStateNotifierTest() {}
   ~NetworkStateNotifierTest() override {}
 
   void SetUp() override {
     testing::Test::SetUp();
     DBusThreadManager::Initialize();
     LoginState::Initialize();
     SetupDefaultShillState();
     NetworkHandler::Initialize();
-    message_center::MessageCenter::Initialize();
     base::RunLoop().RunUntilIdle();
     network_connect_delegate_.reset(new NetworkConnectTestDelegate);
     NetworkConnect::Initialize(network_connect_delegate_.get());
   }
 
   void TearDown() override {
     NetworkConnect::Shutdown();
     network_connect_delegate_.reset();
-    message_center::MessageCenter::Shutdown();
     LoginState::Shutdown();
     NetworkHandler::Shutdown();
     DBusThreadManager::Shutdown();
     testing::Test::TearDown();
   }
 
  protected:
   void SetupDefaultShillState() {
     base::RunLoop().RunUntilIdle();
     ShillDeviceClient::TestInterface* device_test =
@@ skipping 36 matching lines @@
   base::RunLoop().RunUntilIdle();
   // Failure should spawn a notification.
   message_center::MessageCenter* message_center =
       message_center::MessageCenter::Get();
   EXPECT_TRUE(message_center->FindVisibleNotificationById(
       NetworkStateNotifier::kNetworkConnectNotificationId));
 }
 
 }  // namespace test
 }  // namespace chromeos