Initialize the message center as part of the testing browser process

chrome/browser/ui/tab_contents/tab_contents_iterator_unittest.cc

Index: chrome/browser/ui/tab_contents/tab_contents_iterator_unittest.cc
diff --git a/chrome/browser/ui/tab_contents/tab_contents_iterator_unittest.cc b/chrome/browser/ui/tab_contents/tab_contents_iterator_unittest.cc
index 7c71a2f0d5c237cf24e55c99cac8b00b04cc26eb..56a5a1f070f8ce10d534c70bfb48c71a8dbaf164 100644
--- a/chrome/browser/ui/tab_contents/tab_contents_iterator_unittest.cc
+++ b/chrome/browser/ui/tab_contents/tab_contents_iterator_unittest.cc
@@ -21,7 +21,6 @@
 #include "chrome/test/base/testing_browser_process.h"
 #include "components/prefs/pref_registry_simple.h"
 #include "components/prefs/testing_pref_service.h"
-#include "ui/message_center/message_center.h"
 
 #if defined(OS_WIN)
 #include "components/metrics/metrics_pref_names.h"
@@ -186,7 +185,6 @@ TEST_F(BrowserListTest, MAYBE_AttemptRestart) {
   testing_pref_service.registry()->RegisterDictionaryPref(
       prefs::kProfileInfoCache);
 
-  message_center::MessageCenter::Initialize();
   TestingBrowserProcess* testing_browser_process =
       TestingBrowserProcess::GetGlobal();
   testing_browser_process->SetLocalState(&testing_pref_service);