Initialize the message center as part of the testing browser process

chrome/browser/chromeos/status/data_promo_notification_unittest.cc

Index: chrome/browser/chromeos/status/data_promo_notification_unittest.cc
diff --git a/chrome/browser/chromeos/status/data_promo_notification_unittest.cc b/chrome/browser/chromeos/status/data_promo_notification_unittest.cc
index 68f1a0807ba39a2ea3d1a7ec935f419a17780099..cabe8bdc14826d512d83d25986d93c29315c3242 100644
--- a/chrome/browser/chromeos/status/data_promo_notification_unittest.cc
+++ b/chrome/browser/chromeos/status/data_promo_notification_unittest.cc
@@ -70,7 +70,6 @@ class DataPromoNotificationTest : public testing::Test {
     data_promo_notification_.reset(new DataPromoNotification);
     SetupUser();
     SetupNetworkShillState();
-    message_center::MessageCenter::Initialize();
     base::RunLoop().RunUntilIdle();
     network_connect_delegate_.reset(new NetworkConnectTestDelegate);
     chromeos::NetworkConnect::Initialize(network_connect_delegate_.get());
@@ -79,7 +78,6 @@ class DataPromoNotificationTest : public testing::Test {
   void TearDown() override {
     chromeos::NetworkConnect::Shutdown();
     network_connect_delegate_.reset();
-    message_center::MessageCenter::Shutdown();
     LoginState::Shutdown();
     profile_manager_.reset();
     user_manager_enabler_.reset();