[Contextual Search] Add support for tap on the selection.

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 4f6a57832a20fafd5e17ce8fc7c0f37937025563..7ec25d1d442e6d13bbdcb9c7990f4e61120e039d 100644
--- a/ui/touch_selection/touch_selection_controller.h
+++ b/ui/touch_selection/touch_selection_controller.h
@@ -61,11 +61,11 @@ class UI_TOUCH_SELECTION_EXPORT TouchSelectionController
 
   // To be called before forwarding a tap event. This allows automatically
   // showing the insertion handle from subsequent bounds changes.
-  void OnTapEvent();
+  bool WillHandleTapEvent(const gfx::PointF& location);
 
   // To be called before forwarding a longpress event. This allows automatically
   // showing the selection or insertion handles from subsequent bounds changes.
-  void OnLongPressEvent();
+  bool WillHandleLongPressEvent(const gfx::PointF& location);
 
   // Allow showing the selection handles from the most recent selection bounds
   // update (if valid), or a future valid bounds update.
@@ -124,6 +124,7 @@ class UI_TOUCH_SELECTION_EXPORT TouchSelectionController
 
   void ShowInsertionHandleAutomatically();
   void ShowSelectionHandlesAutomatically();
+  bool WillHandleTapOrLongPress(const gfx::PointF& location);
 
   void OnInsertionChanged();
   void OnSelectionChanged();