ash: Add checks for supervised users.

ash/shelf/shelf_widget.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 "ash/shelf/shelf_widget.h"
 
 #include "ash/ash_switches.h"
 #include "ash/focus_cycler.h"
 #include "ash/root_window_controller.h"
 #include "ash/session/session_state_delegate.h"
@@ skipping 696 matching lines @@
 
   opaque_foreground->SetOpacity(target_opacity);
 }
 
 bool ShelfWidget::IsShelfHiddenBehindBlackBar() const {
   return delegate_view_->opaque_foreground()->GetTargetOpacity() != 0.0f;
 }
 
 // static
 bool ShelfWidget::ShelfAlignmentAllowed() {
+  if (Shell::GetInstance()->system_tray_delegate()->IsUserSupervised())
+    return false;
+
   user::LoginStatus login_status =
       Shell::GetInstance()->system_tray_delegate()->GetUserLoginStatus();
 
   switch (login_status) {
     case user::LOGGED_IN_USER:
     case user::LOGGED_IN_OWNER:
       return true;
     case user::LOGGED_IN_LOCKED:
     case user::LOGGED_IN_PUBLIC:
     case user::LOGGED_IN_SUPERVISED:
@@ skipping 109 matching lines @@
   DCHECK(delegate_view_);
   return delegate_view_->disable_dimming_animations_for_test();
 }
 
 void ShelfWidget::WillDeleteShelf() {
   shelf_layout_manager_->RemoveObserver(this);
   shelf_layout_manager_ = NULL;
 }
 
 }  // namespace ash