cros: Add enum to helper function that I forgot to update.

chromeos_wm_ipc_enums.h

 // Copyright (c) 2010 The Chromium OS 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 CHROMEOS_WM_IPC_ENUMS_H_
 #define CHROMEOS_WM_IPC_ENUMS_H_
 
 // This file defines enums that are shared between Chrome and the Chrome OS
 // window manager.
 
@@ skipping 282 matching lines @@
     case WM_IPC_MESSAGE_CHROME_NOTIFY_SYSKEY_PRESSED:
       return "CHROME_NOTIFY_SYSKEY_PRESSED";
     case WM_IPC_MESSAGE_WM_SELECT_LOGIN_USER:
       return "WM_SELECT_LOGIN_USER";
     case WM_IPC_MESSAGE_CHROME_NOTIFY_SCREEN_REDRAWN_FOR_LOCK:
       return "CHROME_NOTIFY_SCREEN_REDRAWN_FOR_LOCK";
     case WM_IPC_MESSAGE_WM_NOTIFY_SHUTTING_DOWN:
       return "WM_NOTIFY_SHUTTING_DOWN";
     case WM_IPC_MESSAGE_WM_NOTIFY_POWER_BUTTON_STATE:
       return "WM_NOTIFY_POWER_BUTTON_STATE";
+    case WM_IPC_MESSAGE_WM_NOTIFY_SIGNING_OUT:
+      return "WM_NOTIFY_SIGNING_OUT";
     default:
       return "INVALID";
   }
 }
 
 // A parameter of the WM_IPC_MESSAGE_CHROME_NOTIFY_SYSKEY_PRESSED message
 // denoting which key is pressed.
 enum WmIpcSystemKey {
   WM_IPC_SYSTEM_KEY_VOLUME_MUTE = 0,
   WM_IPC_SYSTEM_KEY_VOLUME_DOWN = 1,
@@ skipping 26 matching lines @@
   WM_IPC_POWER_BUTTON_PRE_SHUTDOWN,
 
   // The power button was released before being held long enough to shut
   // down the machine.
   WM_IPC_POWER_BUTTON_ABORTED_SHUTDOWN,
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_WM_IPC_ENUMS_H_