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

ui/views/examples/examples_window.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/examples/examples_window.h"
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/i18n/icu_util.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 36 matching lines @@
 namespace views {
 namespace examples {
 
 // Model for the examples that are being added via AddExample().
 class ComboboxModelExampleList : public ui::ComboboxModel {
  public:
   ComboboxModelExampleList() {}
   virtual ~ComboboxModelExampleList() {}
 
   // Overridden from ui::ComboboxModel:
-  virtual int GetItemCount() OVERRIDE { return example_list_.size(); }
+  virtual int GetItemCount() const OVERRIDE { return example_list_.size(); }
   virtual string16 GetItemAt(int index) OVERRIDE {
     return UTF8ToUTF16(example_list_[index]->example_title());
   }
 
   View* GetItemViewAt(int index) {
     return example_list_[index]->example_view();
   }
 
   void AddExample(ExampleBase* example) {
     example_list_.push_back(example);
@@ skipping 135 matching lines @@
                                    gfx::Rect(0, 0, 850, 300))->Show();
   }
 }
 
 void LogStatus(const std::string& string) {
   ExamplesWindowContents::instance()->SetStatus(string);
 }
 
 }  // namespace examples
 }  // namespace views