Revert of Show message center on lock screen

ui/message_center/fake_message_center.cc

Index: ui/message_center/fake_message_center.cc
diff --git a/ui/message_center/fake_message_center.cc b/ui/message_center/fake_message_center.cc
index 1900b0e65f6473447217998775dd441c10efd0a9..acfe78974c31a8cbdf212616bb7c3098a1c48336 100644
--- a/ui/message_center/fake_message_center.cc
+++ b/ui/message_center/fake_message_center.cc
@@ -39,10 +39,6 @@
 }
 
 bool FakeMessageCenter::IsQuietMode() const {
-  return false;
-}
-
-bool FakeMessageCenter::IsLockedState() const {
   return false;
 }
 
@@ -125,8 +121,6 @@
 void FakeMessageCenter::SetQuietMode(bool in_quiet_mode) {
 }
 
-void FakeMessageCenter::SetLockedState(bool locked) {}
-
 void FakeMessageCenter::EnterQuietModeWithExpire(
     const base::TimeDelta& expires_in) {
 }