[cros, Aura] Make screen_mode static variable in StatusAreaViewChromeos

chrome/browser/chromeos/login/login_html_dialog.h

 // Copyright (c) 2011 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 CHROME_BROWSER_CHROMEOS_LOGIN_LOGIN_HTML_DIALOG_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_LOGIN_HTML_DIALOG_H_
 #pragma once
 
 #include <string>
 
@@ skipping 10 matching lines @@
 // Launches html dialog during OOBE/Login with specified URL and title.
 class LoginHtmlDialog : public HtmlDialogUIDelegate,
                         public content::NotificationObserver {
  public:
   // Delegate class to get notifications from the dialog.
   class Delegate {
   public:
     virtual ~Delegate() {}
 
     // Called when dialog has been closed.
-    virtual void OnDialogClosed() = 0;
+    virtual void OnDialogClosed();
   };
 
   enum Style {
     STYLE_GENERIC, // Use generic CreateChromeWindow as a host.
     STYLE_BUBBLE   // Use chromeos::BubbleWindow as a host.
   };
 
   LoginHtmlDialog(Delegate* delegate,
                   gfx::NativeWindow parent_window,
                   const std::wstring& title,
@@ skipping 46 matching lines @@
   // Dialog display size.
   int width_;
   int height_;
 
   DISALLOW_COPY_AND_ASSIGN(LoginHtmlDialog);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_LOGIN_HTML_DIALOG_H_