SearchBoxView now enables/disables cursor based on user interaction.

ui/views/controls/textfield/textfield_controller.h

Index: ui/views/controls/textfield/textfield_controller.h
diff --git a/ui/views/controls/textfield/textfield_controller.h b/ui/views/controls/textfield/textfield_controller.h
index 7dcffb9648ada99292c4cdb40132528b05cf877a..43106ac52fcb9d421eb9e3a851857159be8107eb 100644
--- a/ui/views/controls/textfield/textfield_controller.h
+++ b/ui/views/controls/textfield/textfield_controller.h
@@ -43,6 +43,10 @@ class VIEWS_EXPORT TextfieldController {
   virtual bool HandleMouseEvent(Textfield* sender,
                                 const ui::MouseEvent& mouse_event);
 
+  // This method is called to notify that a gesture event has occured in the
+  // textfield. Currently, only tap events are sent here.
+  virtual void NotifyOfGestureEvent();
+
   // Called before performing a user action that may change the textfield.
   // It's currently only supported by Views implementation.
   virtual void OnBeforeUserAction(Textfield* sender) {}