ui/base/models: Make ComboboxModel::GetItemCount() a constant function.

chrome/browser/ui/views/cookie_info_view.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 "chrome/browser/ui/views/cookie_info_view.h"
 
 #include <algorithm>
 
 #include "base/i18n/time_formatting.h"
 #include "base/message_loop.h"
@@ skipping 127 matching lines @@
 void CookieInfoView::ItemChanged(views::Combobox* combo_box,
                                  int prev_index,
                                  int new_index) {
   DCHECK(combo_box == expires_value_combobox_);
   if (delegate_)
     delegate_->ModifyExpireDate(new_index != 0);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // CookieInfoView, ui::ComboboxModel overrides.
-int CookieInfoView::GetItemCount() {
+int CookieInfoView::GetItemCount() const {
   return static_cast<int>(expire_combo_values_.size());
 }
 
 string16 CookieInfoView::GetItemAt(int index) {
   return expire_combo_values_[index];
 }
 
 void CookieInfoView::AddLabelRow(int layout_id, views::GridLayout* layout,
                                  views::View* label, views::View* value) {
   layout->StartRow(0, layout_id);
@@ skipping 115 matching lines @@
   send_for_value_field_->SetBackgroundColor(text_area_background);
   created_value_field_->SetReadOnly(true);
   created_value_field_->RemoveBorder();
   created_value_field_->SetBackgroundColor(text_area_background);
   if (expires_value_field_) {
     expires_value_field_->SetReadOnly(true);
     expires_value_field_->RemoveBorder();
     expires_value_field_->SetBackgroundColor(text_area_background);
   }
 }