arc: Skip GMS Sign-In in case Android is already signed-in.

chrome/browser/chromeos/arc/arc_auth_service.h

 // Copyright 2016 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_ARC_ARC_AUTH_SERVICE_H_
 #define CHROME_BROWSER_CHROMEOS_ARC_ARC_AUTH_SERVICE_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 22 matching lines @@
 
   // InstanceHolder<mojom::AuthInstance>::Observer:
   void OnInstanceReady() override;
   void OnInstanceClosed() override;
 
   // mojom::AuthHost:
   void OnSignInComplete() override;
   void OnSignInFailed(mojom::ArcSignInFailureReason reason) override;
   void RequestAccountInfo() override;
   void ReportMetrics(mojom::MetricsType metrics_type, int32_t value) override;
+  void ReportAccountCheckStatus(mojom::AccountCheckStatus status) override;
 
   // Deprecated methods:
   // For security reason this code can be used only once and exists for specific
   // period of time.
   void GetAuthCodeDeprecated0(
       const GetAuthCodeDeprecated0Callback& callback) override;
   void GetAuthCodeDeprecated(
       const GetAuthCodeDeprecatedCallback& callback) override;
   void GetAuthCodeAndAccountTypeDeprecated(
       const GetAuthCodeAndAccountTypeDeprecatedCallback& callback) override;
@@ skipping 23 matching lines @@
   std::unique_ptr<ArcAuthInfoFetcher> fetcher_;
 
   base::WeakPtrFactory<ArcAuthService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcAuthService);
 };
 
 }  // namespace arc
 
 #endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_AUTH_SERVICE_H_