Support prefix typing in Combobox while menu is open

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 "build/build_config.h"
 
 #include <list>
@@ skipping 83 matching lines @@
   // An alternative to Cancel(EXIT_ALL) that can be used with a OneShotTimer.
   void CancelAll() { Cancel(EXIT_ALL); }
 
   // 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.
   base::TimeDelta closing_event_time() const { return closing_event_time_; }
 
-  void set_accept_on_f4(bool accept_on_f4) { accept_on_f4_ = accept_on_f4; }
+  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.
   void OnMousePressed(SubmenuView* source, const ui::MouseEvent& event);
   void OnMouseDragged(SubmenuView* source, const ui::MouseEvent& event);
   void OnMouseReleased(SubmenuView* source, const ui::MouseEvent& event);
   void OnMouseMoved(SubmenuView* source, const ui::MouseEvent& event);
   void OnMouseEntered(SubmenuView* source, const ui::MouseEvent& event);
@@ skipping 460 matching lines @@
   // The timestamp of the event which closed the menu - or 0 otherwise.
   base::TimeDelta closing_event_time_;
 
   // Time when the menu is first shown.
   base::TimeTicks menu_start_time_;
 
   // If a mouse press triggered this menu, this will have its location (in
   // screen coordinates). Otherwise this will be (0, 0).
   gfx::Point menu_start_mouse_press_loc_;
 
-  // Whether the menu should accept on F4, like Windows native Combobox menus.
-  bool accept_on_f4_;
+  // Controls behavior differences between a combobox and other types of menu
+  // (like a context menu).
+  bool is_combobox_;
 
   // Set to true if the menu item was selected by touch.
   bool item_selected_by_touch_;
 
   DISALLOW_COPY_AND_ASSIGN(MenuController);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MENU_MENU_CONTROLLER_H_