Eliminate ash::internal namespace

ash/system/chromeos/managed/tray_locally_managed_user.h

Index: ash/system/chromeos/managed/tray_locally_managed_user.h
diff --git a/ash/system/chromeos/managed/tray_locally_managed_user.h b/ash/system/chromeos/managed/tray_locally_managed_user.h
index a508ec39e66306ed47cb630c6ce7e2a2e8ec3f9a..666530b3d85ca04c31d0707ffc4c98f091f78e4d 100644
--- a/ash/system/chromeos/managed/tray_locally_managed_user.h
+++ b/ash/system/chromeos/managed/tray_locally_managed_user.h
@@ -11,11 +11,8 @@
 #include "base/strings/string16.h"
 
 namespace ash {
-class SystemTray;
-
-namespace internal {
-
 class LabelTrayView;
+class SystemTray;
 
 class ASH_EXPORT TrayLocallyManagedUser : public SystemTrayItem,
                                           public ViewClickListener {
@@ -49,7 +46,6 @@ class ASH_EXPORT TrayLocallyManagedUser : public SystemTrayItem,
   DISALLOW_COPY_AND_ASSIGN(TrayLocallyManagedUser);
 };
 
-} // namespace internal
 } // namespace ash
 
 #endif  // ASH_SYSTEM_CHROMEOS_LOCALLY_MANAGED_TRAY_LOCALLY_MANAGED_USER_H