Reconfigure displays even if the output count didn't change

ash/system/chromeos/tray_display.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/system/chromeos/tray_display.h"
 
 #include "ash/display/display_controller.h"
 #include "ash/display/display_manager.h"
 #include "ash/screen_ash.h"
 #include "ash/shell.h"
@@ skipping 50 matching lines @@
       case chromeos::STATE_HEADLESS:
       case chromeos::STATE_SINGLE:
         SetVisible(false);
         return;
       case chromeos::STATE_DUAL_MIRROR: {
         label_->SetText(l10n_util::GetStringFUTF16(
             IDS_ASH_STATUS_TRAY_DISPLAY_MIRRORING, GetExternalDisplayName()));
         SetVisible(true);
         return;
       }
-      case chromeos::STATE_DUAL_PRIMARY_ONLY:
-      case chromeos::STATE_DUAL_SECONDARY_ONLY:
+      case chromeos::STATE_DUAL_EXTENDED:
       case chromeos::STATE_DUAL_UNKNOWN: {
         label_->SetText(l10n_util::GetStringFUTF16(
             IDS_ASH_STATUS_TRAY_DISPLAY_EXTENDED, GetExternalDisplayName()));
         SetVisible(true);
         return;
       }
       default:
         NOTREACHED();
     }
   }
@@ skipping 100 matching lines @@
     default_->Update();
 }
 
 void TrayDisplay::OnDisplayModeChanged() {
   if (default_)
     default_->Update();
 }
 
 }  // namespace internal
 }  // namespace ash