arc: Implement silent OptIn mode for managed Arc.

chrome/browser/chromeos/arc/arc_auth_service.cc

 // Copyright 2015 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 "chrome/browser/chromeos/arc/arc_auth_service.h"
 
 #include <string>
 #include <utility>
 
 #include "ash/shelf/shelf_delegate.h"
@@ skipping 654 matching lines @@
   ubertoken_fetcher_->StartFetchingToken(account_id_);
 }
 
 void ArcAuthService::StartUI() {
   DCHECK(thread_checker.Get().CalledOnValidThread());
 
   SetState(State::FETCHING_CODE);
 
   if (initial_opt_in_) {
     initial_opt_in_ = false;
-    ShowUI(UIPage::START, base::string16());
+    ShowUI(IsArcManaged() ? UIPage::LSO_PROGRESS : UIPage::START,
+           base::string16());
   } else if (context_prepared_) {
     CheckAndroidManagement(false);
   } else {
     PrepareContext();
   }
 }
 
 void ArcAuthService::OnPrepareContextFailed() {
   DCHECK_EQ(state_, State::FETCHING_CODE);
 
@@ skipping 71 matching lines @@
       return os << kStateFetchingCode;
     case ArcAuthService::State::ACTIVE:
       return os << kStateActive;
     default:
       NOTREACHED();
       return os;
   }
 }
 
 }  // namespace arc