Remove auto raw pointer deduction from non-linux specific code.

ash/common/system/update/tray_update.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/common/system/update/tray_update.h"
 
 #include "ash/common/metrics/user_metrics_action.h"
 #include "ash/common/strings/grit/ash_strings.h"
 #include "ash/common/system/tray/fixed_sized_image_view.h"
 #include "ash/common/system/tray/system_tray.h"
@@ skipping 64 matching lines @@
         kSystemMenuUpdateIcon,
         IconColorForUpdateSeverity(owner->severity_, true)));
     tri_view->AddView(TriView::Container::START, image);
 
     base::string16 label_text =
         owner->factory_reset_required_
             ? bundle.GetLocalizedString(
                   IDS_ASH_STATUS_TRAY_RESTART_AND_POWERWASH_TO_UPDATE)
             : bundle.GetLocalizedString(IDS_ASH_STATUS_TRAY_UPDATE);
     SetAccessibleName(label_text);
-    auto label = TrayPopupUtils::CreateDefaultLabel();
+    auto* label = TrayPopupUtils::CreateDefaultLabel();
     label->SetText(label_text);
     TrayPopupItemStyle style(TrayPopupItemStyle::FontStyle::DEFAULT_VIEW_LABEL);
     style.SetupLabel(label);
     tri_view->AddView(TriView::Container::CENTER, label);
 
     SetInkDropMode(InkDropHostView::InkDropMode::ON);
   }
 
   ~UpdateView() override {}
 
@@ skipping 31 matching lines @@
   update_required_ = true;
   severity_ = severity;
   factory_reset_required_ = factory_reset_required;
 
   // Show the icon in the tray.
   SetIconColor(IconColorForUpdateSeverity(severity_, false));
   tray_view()->SetVisible(true);
 }
 
 }  // namespace ash