views: Rename ComboboxListener::ItemChanged to something more accurate.

ui/views/examples/native_theme_button_example.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_EXAMPLES_NATIVE_THEME_BUTTON_EXAMPLE_H_
 #define UI_VIEWS_EXAMPLES_NATIVE_THEME_BUTTON_EXAMPLE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 22 matching lines @@
   virtual ~ExampleNativeThemeButton();
 
   std::string MessWithState();
 
  private:
   // Overridden from View:
   virtual gfx::Size GetPreferredSize() OVERRIDE;
   virtual void OnPaintBackground(gfx::Canvas* canvas)  OVERRIDE;
 
   // Overridden from ComboboxListener:
-  virtual void ItemChanged(Combobox* combo_box,
-                           int prev_index,
-                           int new_index) OVERRIDE;
+  virtual void OnSelectedIndexChanged(Combobox* combobox) OVERRIDE;
 
   // Overridden from NativeThemeDelegate:
   virtual gfx::NativeTheme::Part GetThemePart() const OVERRIDE;
   virtual gfx::Rect GetThemePaintRect() const OVERRIDE;
   virtual gfx::NativeTheme::State GetThemeState(
       gfx::NativeTheme::ExtraParams* params) const OVERRIDE;
   virtual const ui::Animation* GetThemeAnimation() const OVERRIDE;
   virtual gfx::NativeTheme::State GetBackgroundThemeState(
       gfx::NativeTheme::ExtraParams* params) const OVERRIDE;
   virtual gfx::NativeTheme::State GetForegroundThemeState(
@@ skipping 30 matching lines @@
   scoped_ptr<ExampleComboboxModel> combobox_model_part_;
   scoped_ptr<ExampleComboboxModel> combobox_model_state_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeThemeButtonExample);
 };
 
 }  // namespace examples
 }  // namespace views
 
 #endif  // UI_VIEWS_EXAMPLES_NATIVE_THEME_BUTTON_EXAMPLE_H_