views/examples: Clean up cpplint warnings.

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 <string>
+
 #include "base/memory/scoped_vector.h"
-#include "base/process_util.h"
-#include "base/stl_util.h"
 #include "base/utf_string_conversions.h"
 #include "content/public/browser/browser_context.h"
 #include "ui/base/models/combobox_model.h"
 #include "ui/base/ui_base_paths.h"
 #include "ui/views/controls/button/text_button.h"
 #include "ui/views/controls/combobox/combobox.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/controls/tabbed_pane/tabbed_pane.h"
 #include "ui/views/examples/bubble_example.h"
 #include "ui/views/examples/button_example.h"
@@ skipping 187 matching lines @@
                                    gfx::Rect(0, 0, 850, 300))->Show();
   }
 }
 
 void LogStatus(const std::string& string) {
   ExamplesWindowContents::instance()->SetStatus(string);
 }
 
 }  // namespace examples
 }  // namespace views