[aura] Stop accelerators that are not allowed on login screen from working on user image screen.

ash/accelerators/accelerator_controller.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/accelerators/accelerator_controller.h"
 
 #include <algorithm>
 #include <cmath>
 #include <string>
 
@@ skipping 352 matching lines @@
     return false;  // not an accelerator.
 
   return reserved_actions_.find(iter->second) != reserved_actions_.end();
 }
 
 bool AcceleratorController::PerformAction(int action,
                                           const ui::Accelerator& accelerator) {
   ash::Shell* shell = ash::Shell::GetInstance();
   bool at_login_screen = false;
 #if defined(OS_CHROMEOS)
-  at_login_screen = (shell->delegate() && !shell->delegate()->IsUserLoggedIn());
+  at_login_screen = shell->delegate() && !shell->delegate()->IsSessionStarted();
 #endif
   bool at_lock_screen = shell->IsScreenLocked();
 
   if (at_login_screen &&
       actions_allowed_at_login_screen_.find(action) ==
       actions_allowed_at_login_screen_.end()) {
     return false;
   }
   if (at_lock_screen &&
       actions_allowed_at_lock_screen_.find(action) ==
@@ skipping 367 matching lines @@
     accelerators_.insert(
         std::make_pair(accelerator, accelerators[i].action));
   }
 }
 
 bool AcceleratorController::CanHandleAccelerators() const {
   return true;
 }
 
 }  // namespace ash