Initialize the message center as part of the testing browser process

chrome/browser/chromeos/net/network_state_notifier_unittest.cc

Index: chrome/browser/chromeos/net/network_state_notifier_unittest.cc
diff --git a/chrome/browser/chromeos/net/network_state_notifier_unittest.cc b/chrome/browser/chromeos/net/network_state_notifier_unittest.cc
index 82c03fac181f4662535b47fcbbafcd229adb9c3b..1419b2d42c3d26e2f2d1049b36dcdac4a5760666 100644
--- a/chrome/browser/chromeos/net/network_state_notifier_unittest.cc
+++ b/chrome/browser/chromeos/net/network_state_notifier_unittest.cc
@@ -66,7 +66,6 @@ class NetworkStateNotifierTest : public testing::Test {
     LoginState::Initialize();
     SetupDefaultShillState();
     NetworkHandler::Initialize();
-    message_center::MessageCenter::Initialize();
     base::RunLoop().RunUntilIdle();
     network_connect_delegate_.reset(new NetworkConnectTestDelegate);
     NetworkConnect::Initialize(network_connect_delegate_.get());
@@ -75,7 +74,6 @@ class NetworkStateNotifierTest : public testing::Test {
   void TearDown() override {
     NetworkConnect::Shutdown();
     network_connect_delegate_.reset();
-    message_center::MessageCenter::Shutdown();
     LoginState::Shutdown();
     NetworkHandler::Shutdown();
     DBusThreadManager::Shutdown();