Be explicit about forcing TouchSelectionController updates

ui/touch_selection/touch_selection_controller.h

Index: ui/touch_selection/touch_selection_controller.h
diff --git a/ui/touch_selection/touch_selection_controller.h b/ui/touch_selection/touch_selection_controller.h
index f1a434d5b9b8d2ea7593eaa5da20a25a1f39d6a9..4f6a57832a20fafd5e17ce8fc7c0f37937025563 100644
--- a/ui/touch_selection/touch_selection_controller.h
+++ b/ui/touch_selection/touch_selection_controller.h
@@ -132,7 +132,7 @@ class UI_TOUCH_SELECTION_EXPORT TouchSelectionController
   void DeactivateInsertion();
   void ActivateSelection();
   void DeactivateSelection();
-  void ResetCachedValuesIfInactive();
+  void ForceNextUpdateIfInactive();
 
   gfx::Vector2dF GetStartLineOffset() const;
   gfx::Vector2dF GetEndLineOffset() const;
@@ -146,6 +146,10 @@ class UI_TOUCH_SELECTION_EXPORT TouchSelectionController
   const base::TimeDelta tap_timeout_;
   const float tap_slop_;
 
+  // Whether to force an update on the next selection event even if the
+  // cached selection matches the new selection.
+  bool force_next_update_;
+
   // Controls whether an insertion handle is shown on a tap for an empty
   // editable text.
   bool show_on_tap_for_empty_editable_;