[Eraser] First pass at removing the notification center panel.

ui/message_center/fake_message_center_tray_delegate.h

Index: ui/message_center/fake_message_center_tray_delegate.h
diff --git a/ui/message_center/fake_message_center_tray_delegate.h b/ui/message_center/fake_message_center_tray_delegate.h
index e43eb7a899ab3e9e6bdaca917b9fcfdd26b45729..b698d89ba90b27bb547140014378321e42a1d646 100644
--- a/ui/message_center/fake_message_center_tray_delegate.h
+++ b/ui/message_center/fake_message_center_tray_delegate.h
@@ -18,14 +18,9 @@ class MessageCenterTray;
 // A message center tray delegate which does nothing.
 class FakeMessageCenterTrayDelegate : public MessageCenterTrayDelegate {
  public:
-  FakeMessageCenterTrayDelegate(MessageCenter* message_center,
-                                base::Closure quit_closure);
+  FakeMessageCenterTrayDelegate(MessageCenter* message_center);
   ~FakeMessageCenterTrayDelegate() override;
 
-  bool displayed_first_run_balloon() const {
-    return displayed_first_run_balloon_;
-  }
-
   // Overridden from MessageCenterTrayDelegate:
   void OnMessageCenterTrayChanged() override;
   bool ShowPopups() override;
@@ -35,7 +30,6 @@ class FakeMessageCenterTrayDelegate : public MessageCenterTrayDelegate {
   bool ShowNotifierSettings() override;
   bool IsContextMenuEnabled() const override;
   MessageCenterTray* GetMessageCenterTray() override;
-  void DisplayFirstRunBalloon() override;
 
  private:
   scoped_ptr<MessageCenterTray> tray_;