Aura tooltips do not move on mouse move in case of many neighboring views with the same label

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 9815df1817a46d4f76cf17c459310b0502a34ead..e0453341f0059583086245e026edf0fde84ac8d8 100644
--- a/ui/views/corewm/tooltip_controller.h
+++ b/ui/views/corewm/tooltip_controller.h
@@ -61,7 +61,7 @@ class VIEWS_EXPORT TooltipController : public aura::client::TooltipClient,
   void TooltipShownTimerFired();
 
   // Updates the tooltip if required (if there is any change in the tooltip
-  // text or the aura::Window.
+  // text, tooltip id or the aura::Window).
   void UpdateIfRequired();
 
   // Only used in tests.
@@ -81,6 +81,7 @@ class VIEWS_EXPORT TooltipController : public aura::client::TooltipClient,
 
   aura::Window* tooltip_window_;
   base::string16 tooltip_text_;
+  const void* tooltip_id_;
 
   // These fields are for tracking state when the user presses a mouse button.
   aura::Window* tooltip_window_at_mouse_press_;