Initialize the message center as part of the testing browser process

chrome/browser/background/background_contents_service_unittest.cc

Index: chrome/browser/background/background_contents_service_unittest.cc
diff --git a/chrome/browser/background/background_contents_service_unittest.cc b/chrome/browser/background/background_contents_service_unittest.cc
index ee49d79efdd7eeeed22e28b4964805f1669b8d38..0690341648546e7f44493e4b44c2c58d168376d3 100644
--- a/chrome/browser/background/background_contents_service_unittest.cc
+++ b/chrome/browser/background/background_contents_service_unittest.cc
@@ -180,11 +180,6 @@ class BackgroundContentsServiceNotificationTest
   // Overridden from testing::Test
   void SetUp() override {
     BrowserWithTestWindowTest::SetUp();
-    // In ChromeOS environment, BrowserWithTestWindowTest initializes
-    // MessageCenter.
-#if !defined(OS_CHROMEOS)
-    message_center::MessageCenter::Initialize();
-#endif
     profile_manager_.reset(new TestingProfileManager(
         TestingBrowserProcess::GetGlobal()));
     ASSERT_TRUE(profile_manager_->SetUp());
@@ -199,9 +194,6 @@ class BackgroundContentsServiceNotificationTest
   void TearDown() override {
     g_browser_process->notification_ui_manager()->CancelAll();
     profile_manager_.reset();
-#if !defined(OS_CHROMEOS)
-    message_center::MessageCenter::Shutdown();
-#endif
     BrowserWithTestWindowTest::TearDown();
   }