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..0dff66b14b382b0ed87c32ed4673dfd9acff6e1d 100644
--- a/ui/views/corewm/tooltip_controller.h
+++ b/ui/views/corewm/tooltip_controller.h
@@ -38,7 +38,8 @@ class VIEWS_EXPORT TooltipController : public aura::client::TooltipClient,
   virtual ~TooltipController();
 
   // Overridden from aura::client::TooltipClient.
-  virtual void UpdateTooltip(aura::Window* target) OVERRIDE;
+  virtual void UpdateTooltip(aura::Window* target,
+                             bool force) OVERRIDE;
   virtual void SetTooltipShownTimeout(aura::Window* target,
                                       int timeout_in_ms) OVERRIDE;
   virtual void SetTooltipsEnabled(bool enable) OVERRIDE;
@@ -61,8 +62,9 @@ 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.
-  void UpdateIfRequired();
+  // text or the aura::Window). If |force| is true the tooltip will be updated
+  // regardless of these conditions.
+  void UpdateIfRequired(bool force);
 
   // Only used in tests.
   bool IsTooltipVisible();