[Desktop] Add diagnostics about loading the refresh tokens.

components/signin/core/browser/about_signin_internals.h

 // 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.
 
 #ifndef COMPONENTS_SIGNIN_CORE_BROWSER_ABOUT_SIGNIN_INTERNALS_H_
 #define COMPONENTS_SIGNIN_CORE_BROWSER_ABOUT_SIGNIN_INTERNALS_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 19 matching lines @@
 
 // Many values in SigninStatus are also associated with a timestamp.
 // This makes it easier to keep values and their associated times together.
 using TimedSigninStatusValue = std::pair<std::string, std::string>;
 
 // This class collects authentication, signin and token information
 // to propagate to about:signin-internals via SigninInternalsUI.
 class AboutSigninInternals
     : public KeyedService,
       public signin_internals_util::SigninDiagnosticsObserver,
+      public OAuth2TokenService::Observer,
       public OAuth2TokenService::DiagnosticsObserver,
       public GaiaCookieManagerService::Observer,
       SigninManagerBase::Observer,
       SigninErrorController::Observer {
  public:
   class Observer {
    public:
     // |info| will contain the dictionary of signin_status_ values as indicated
     // in the comments for GetSigninStatus() below.
     virtual void OnSigninStateChanged(const base::DictionaryValue* info) = 0;
@@ skipping 127 matching lines @@
       const std::string& consumer_id,
       const OAuth2TokenService::ScopeSet& scopes) override;
   void OnFetchAccessTokenComplete(const std::string& account_id,
                                   const std::string& consumer_id,
                                   const OAuth2TokenService::ScopeSet& scopes,
                                   GoogleServiceAuthError error,
                                   base::Time expiration_time) override;
   void OnTokenRemoved(const std::string& account_id,
                       const OAuth2TokenService::ScopeSet& scopes) override;
 
+  // OAuth2TokenServiceDelegate::Observer implementations.
+  void OnRefreshTokensLoaded() override;
+
   // SigninManagerBase::Observer implementations.
   void GoogleSigninFailed(const GoogleServiceAuthError& error) override;
   void GoogleSigninSucceeded(const std::string& account_id,
                                      const std::string& username,
                                      const std::string& password) override;
   void GoogleSignedOut(const std::string& account_id,
                                const std::string& username) override;
 
   void NotifyObservers();
 
@@ skipping 21 matching lines @@
   // Encapsulates the actual signin and token related values.
   // Most of the values are mirrored in the prefs for persistence.
   SigninStatus signin_status_;
 
   base::ObserverList<Observer> signin_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(AboutSigninInternals);
 };
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_ABOUT_SIGNIN_INTERNALS_H_