views: Make view::Views::GetPreferredSize() const.

ui/views/controls/menu/menu_delegate.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_DELEGATE_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_DELEGATE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 85 matching lines @@
                                   bool is_hovered,
                                   SkColor* override_color) const;
 
   // The tooltip shown for the menu item. This is invoked when the user
   // hovers over the item, and no tooltip text has been set for that item.
   virtual base::string16 GetTooltipText(int id,
                                         const gfx::Point& screen_loc) const;
 
   // If there is an accelerator for the menu item with id |id| it is set in
   // |accelerator| and true is returned.
-  virtual bool GetAccelerator(int id, ui::Accelerator* accelerator);
+  virtual bool GetAccelerator(int id, ui::Accelerator* accelerator) const;
 
   // Shows the context menu with the specified id. This is invoked when the
   // user does the appropriate gesture to show a context menu. The id
   // identifies the id of the menu to show the context menu for.
   // is_mouse_gesture is true if this is the result of a mouse gesture.
   // If this is not the result of a mouse gesture |p| is the recommended
   // location to display the content menu at. In either case, |p| is in
   // screen coordinates.
   // Returns true if a context menu was displayed, otherwise false
   virtual bool ShowContextMenu(MenuItemView* source,
@@ skipping 124 matching lines @@
                                         int* left_margin,
                                         int* right_margin) const;
   // Returns true if the labels should reserve additional spacing for e.g.
   // submenu indicators at the end of the line.
   virtual bool ShouldReserveSpaceForSubmenuIndicator() const;
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MENU_MENU_DELEGATE_H_