[Desktop] Add diagnostics about loading the refresh tokens.

chrome/browser/signin/mutable_profile_oauth2_token_service_delegate.h

 // 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.
 
 #ifndef CHROME_BROWSER_SIGNIN_MUTABLE_PROFILE_OAUTH2_TOKEN_SERVICE_DELEGATE_H_
 #define CHROME_BROWSER_SIGNIN_MUTABLE_PROFILE_OAUTH2_TOKEN_SERVICE_DELEGATE_H_
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/scoped_vector.h"
@@ skipping 36 matching lines @@
   void LoadCredentials(const std::string& primary_account_id) override;
   void UpdateCredentials(const std::string& account_id,
                          const std::string& refresh_token) override;
   void RevokeAllCredentials() override;
 
   // Revokes credentials related to |account_id|.
   void RevokeCredentials(const std::string& account_id) override;
 
   // Overridden from OAuth2TokenServiceDelegate.
   void Shutdown() override;
+  LoadCredentialsState GetLoadCredentialsState() const override;
 
   // Overridden from NetworkChangeObserver.
   void OnNetworkChanged(net::NetworkChangeNotifier::ConnectionType type)
       override;
 
   // Overridden from OAuth2TokenServiceDelegate.
   const net::BackoffEntry* BackoffEntry() const override;
 
   // Returns the account's refresh token used for testing purposes.
   std::string GetRefreshTokenForTest(const std::string& account_id) const;
@@ skipping 77 matching lines @@
   // In memory refresh token store mapping account_id to refresh_token.
   AccountStatusMap refresh_tokens_;
 
   // Handle to the request reading tokens from database.
   WebDataServiceBase::Handle web_data_service_request_;
 
   // The primary account id of this service's profile during the loading of
   // credentials.  This member is empty otherwise.
   std::string loading_primary_account_id_;
 
+  // The state of the load credentials operation.
+  LoadCredentialsState load_credentials_state_;
+
   ScopedVector<RevokeServerRefreshToken> server_revokes_;
 
   // Used to verify that certain methods are called only on the thread on which
   // this instance was created.
   base::ThreadChecker thread_checker_;
 
   // Used to rate-limit network token requests so as to not overload the server.
   net::BackoffEntry::Policy backoff_policy_;
   net::BackoffEntry backoff_entry_;
   GoogleServiceAuthError backoff_error_;
 
   SigninClient* client_;
   SigninErrorController* signin_error_controller_;
   AccountTrackerService* account_tracker_service_;
 
   DISALLOW_COPY_AND_ASSIGN(MutableProfileOAuth2TokenServiceDelegate);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_MUTABLE_PROFILE_OAUTH2_TOKEN_SERVICE_DELEGATE_H_