Show message center on lock screen

ui/message_center/fake_message_center.h

Index: ui/message_center/fake_message_center.h
diff --git a/ui/message_center/fake_message_center.h b/ui/message_center/fake_message_center.h
index 023df8e713b81566e7a88c44f6414b621d671177..6cee5daf63c7bb8493cdc876bd23c1e89efb0b3e 100644
--- a/ui/message_center/fake_message_center.h
+++ b/ui/message_center/fake_message_center.h
@@ -30,6 +30,7 @@ class FakeMessageCenter : public MessageCenter {
   size_t UnreadNotificationCount() const override;
   bool HasPopupNotifications() const override;
   bool IsQuietMode() const override;
+  bool IsLockedState() const override;
   bool HasClickedListener(const std::string& id) override;
   message_center::Notification* FindVisibleNotificationById(
       const std::string& id) override;
@@ -63,6 +64,7 @@ class FakeMessageCenter : public MessageCenter {
   void SetNotifierSettingsProvider(NotifierSettingsProvider* provider) override;
   NotifierSettingsProvider* GetNotifierSettingsProvider() override;
   void SetQuietMode(bool in_quiet_mode) override;
+  void SetLockedState(bool locked) override;
   void EnterQuietModeWithExpire(const base::TimeDelta& expires_in) override;
   void SetVisibility(Visibility visible) override;
   bool IsMessageCenterVisible() const override;