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

ui/views/controls/menu/menu_delegate.cc

 // 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.
 
 #include "ui/views/controls/menu/menu_delegate.h"
 
 #include "ui/events/event.h"
 #include "ui/views/controls/menu/menu_config.h"
 
 namespace views {
@@ skipping 27 matching lines @@
                                       bool is_hovered,
                                       SkColor* override_color) const {
   return false;
 }
 
 base::string16 MenuDelegate::GetTooltipText(int id,
                                       const gfx::Point& screen_loc) const {
   return base::string16();
 }
 
-bool MenuDelegate::GetAccelerator(int id, ui::Accelerator* accelerator) {
+bool MenuDelegate::GetAccelerator(int id, ui::Accelerator* accelerator) const {
   return false;
 }
 
 bool MenuDelegate::ShowContextMenu(MenuItemView* source,
                                    int id,
                                    const gfx::Point& p,
                                    ui::MenuSourceType source_type) {
   return false;
 }
 
@@ skipping 98 matching lines @@
                                             int* right_margin) const {
   *left_margin = 0;
   *right_margin = 0;
 }
 
 bool MenuDelegate::ShouldReserveSpaceForSubmenuIndicator() const {
   return true;
 }
 
 }  // namespace views