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

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 98 matching lines @@
 
   // Overridden from View:
   virtual void ViewHierarchyChanged(bool is_add,
                                     View* parent,
                                     View* child) OVERRIDE {
     if (is_add && child == this)
       InitExamplesWindow();
   }
 
   // Overridden from ComboboxListener:
-  virtual void ItemChanged(Combobox* combo_box,
-                           int prev_index,
-                           int new_index) OVERRIDE {
-    DCHECK(combo_box && combo_box == combobox_);
-    DCHECK(new_index < combobox_model_.GetItemCount());
+  virtual void OnSelectedIndexChanged(Combobox* combobox) OVERRIDE {
+    DCHECK_EQ(combobox, combobox_);
+    DCHECK(combobox->selected_index() < combobox_model_.GetItemCount());
     example_shown_->RemoveAllChildViews(false);
-    example_shown_->AddChildView(combobox_model_.GetItemViewAt(new_index));
+    example_shown_->AddChildView(combobox_model_.GetItemViewAt(
+        combobox->selected_index()));
     example_shown_->RequestFocus();
     SetStatus(std::string());
     Layout();
   }
 
   // Creates the layout within the examples window.
   void InitExamplesWindow() {
     AddExamples();
 
     set_background(Background::CreateStandardPanelBackground());
@@ skipping 67 matching lines @@
                                    gfx::Rect(0, 0, 850, 300))->Show();
   }
 }
 
 void LogStatus(const std::string& string) {
   ExamplesWindowContents::instance()->SetStatus(string);
 }
 
 }  // namespace examples
 }  // namespace views