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

chrome/browser/chromeos/arc/arc_auth_context.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_CONTEXT_H_
 #define CHROME_BROWSER_CHROMEOS_ARC_ARC_AUTH_CONTEXT_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 18 matching lines @@
 class ArcAuthContext : public UbertokenConsumer,
                        public GaiaAuthConsumer,
                        public OAuth2TokenService::Observer {
  public:
   explicit ArcAuthContext(Profile* profile);
   ~ArcAuthContext() override;
 
   ProfileOAuth2TokenService* token_service() { return token_service_; }
   const std::string& account_id() const { return account_id_; }
 
+  // Returns full account id, including dots that are removed in CrOS for
+  // the default account id.
+  const std::string& full_account_id() const { return full_account_id_; }
+
   // Prepares the context. Calling while an inflight operation exists will
   // cancel the inflight operation.
   // On completion, |context| is passed to the callback. On error, |context|
   // is nullptr.
   using PrepareCallback =
       base::Callback<void(net::URLRequestContextGetter* context)>;
   void Prepare(const PrepareCallback& callback);
 
   // OAuth2TokenService::Observer:
   void OnRefreshTokenAvailable(const std::string& account_id) override;
   void OnRefreshTokensLoaded() override;
 
   // UbertokenConsumer:
   void OnUbertokenSuccess(const std::string& token) override;
   void OnUbertokenFailure(const GoogleServiceAuthError& error) override;
 
   // GaiaAuthConsumer:
   void OnMergeSessionSuccess(const std::string& data) override;
   void OnMergeSessionFailure(const GoogleServiceAuthError& error) override;
 
  private:
   void OnRefreshTokenTimeout();
 
   void StartFetchers();
   void ResetFetchers();
 
   // Unowned pointer.
   ProfileOAuth2TokenService* token_service_;
   std::string account_id_;
+  std::string full_account_id_;
 
   // Owned by content::BrowserContent. Used to isolate cookies for auth server
   // communication and shared with ARC OptIn UI platform app.
   content::StoragePartition* storage_partition_ = nullptr;
 
   PrepareCallback callback_;
   bool context_prepared_ = false;
 
   base::OneShotTimer refresh_token_timeout_;
   std::unique_ptr<GaiaAuthFetcher> merger_fetcher_;
   std::unique_ptr<UbertokenFetcher> ubertoken_fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcAuthContext);
 };
 
 }  // namespace arc
 
 #endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_AUTH_CONTEXT_H_