Change ui::Event::time_stamp from TimeDelta to TimeTicks

ui/views/controls/menu/menu_controller.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_CONTROLLER_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_CONTROLLER_H_
 
 #include <stddef.h>
 
 #include <list>
@@ skipping 114 matching lines @@
   // Sets whether the subsequent call to Run is asynchronous. When nesting calls
   // to Run, if a new MenuControllerDelegate has been nested, the previous
   // asynchronous state will be reapplied once nesting has ended.
   void SetAsyncRun(bool is_async);
 
   // Returns the current exit type. This returns a value other than EXIT_NONE if
   // the menu is being canceled.
   ExitType exit_type() const { return exit_type_; }
 
   // Returns the time from the event which closed the menu - or 0.
+  // TODO(majidvp): Should return a TimeTicks. crbug.com/453559
   base::TimeDelta closing_event_time() const { return closing_event_time_; }
 
   void set_is_combobox(bool is_combobox) { is_combobox_ = is_combobox; }
 
   // Various events, forwarded from the submenu.
   //
   // NOTE: the coordinates of the events are in that of the
   // MenuScrollViewContainer.
   bool OnMousePressed(SubmenuView* source, const ui::MouseEvent& event);
   bool OnMouseDragged(SubmenuView* source, const ui::MouseEvent& event);
@@ skipping 560 matching lines @@
 #if defined(USE_AURA)
   std::unique_ptr<MenuKeyEventHandler> key_event_handler_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(MenuController);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MENU_MENU_CONTROLLER_H_