views: Extract Widget observer into its own header file.

chrome/browser/chromeos/status/data_promo_notification.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/chromeos/status/data_promo_notification.h"
 
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/cros/network_library.h"
 #include "chrome/browser/chromeos/login/helper.h"
 #include "chrome/browser/chromeos/login/message_bubble.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/chromeos/mobile_config.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/common/pref_names.h"
 #include "grit/generated_resources.h"
 #include "grit/theme_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/views/view.h"
+#include "ui/views/widget/widget.h"
 
 namespace {
 
 // Time in milliseconds to delay showing of promo
 // notification when Chrome window is not on screen.
 const int kPromoShowDelayMs = 10000;
 
 const int kNotificationCountPrefDefault = -1;
 
 bool GetBooleanPref(const char* pref_name) {
@@ skipping 193 matching lines @@
 void DataPromoNotification::OnWidgetClosing(views::Widget* widget) {
   if (!mobile_data_bubble_ || mobile_data_bubble_->GetWidget() != widget)
     return;
 
   mobile_data_bubble_ = NULL;
   deal_info_url_.clear();
   deal_topup_url_.clear();
 }
 
 }  // namespace chromeos