Add GetScreenMode() to status_area_host.h.

chrome/browser/chromeos/status/status_area_host.h

 // Copyright (c) 2010 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_STATUS_STATUS_AREA_HOST_H_
 #define CHROME_BROWSER_CHROMEOS_STATUS_STATUS_AREA_HOST_H_
 #pragma once
 
 #include "gfx/native_widget_types.h"
 
@@ skipping 20 matching lines @@
   // shown.
   virtual bool ShouldOpenButtonOptions(
       const views::View* button_view) const = 0;
 
   // Opens options dialog related to the button specified.
   virtual void OpenButtonOptions(const views::View* button_view) = 0;
 
   // Executes browser command.
   virtual void ExecuteBrowserCommand(int id) const = 0;
 
-  // True if status area hosted in browser. Otherwise it's OOBE/login state.
-  virtual bool IsBrowserMode() const = 0;
+  // The type of screen the host window is on.
+  enum ScreenMode {
+    kLoginMode,  // The host is for the OOBE/login screens.
+    kBrowserMode,  // The host is for browser.
+    kScreenLockerMode,  // The host is for screen locker.
+  };
 
-  // True if status area hosted in screen locker.
-  virtual bool IsScreenLockerMode() const = 0;
+  // Returns the type of screen.
+  virtual ScreenMode GetScreenMode() const = 0;
 
  protected:
   virtual ~StatusAreaHost() {}
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_STATUS_STATUS_AREA_HOST_H_