Remove unnecessary spin in ToolTipController

ui/views/corewm/tooltip_controller.h

Index: ui/views/corewm/tooltip_controller.h
diff --git a/ui/views/corewm/tooltip_controller.h b/ui/views/corewm/tooltip_controller.h
index 5a274e319cd5edea134ef540a759884c323edbe0..a9dd60ac63dddad36dc79898881ce5f6371585dd 100644
--- a/ui/views/corewm/tooltip_controller.h
+++ b/ui/views/corewm/tooltip_controller.h
@@ -58,7 +58,6 @@ class VIEWS_EXPORT TooltipController : public aura::client::TooltipClient,
  private:
   friend class test::TooltipControllerTestHelper;
 
-  void TooltipTimerFired();
   void TooltipShownTimerFired();
 
   // Updates the tooltip if required (if there is any change in the tooltip
@@ -90,8 +89,6 @@ class VIEWS_EXPORT TooltipController : public aura::client::TooltipClient,
 
   std::unique_ptr<Tooltip> tooltip_;
 
-  base::RepeatingTimer tooltip_timer_;
-
   // Timer to timeout the life of an on-screen tooltip. We hide the tooltip when
   // this timer fires.
   base::OneShotTimer tooltip_shown_timer_;