[Desktop] Add diagnostics about loading the refresh tokens.

google_apis/gaia/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 GOOGLE_APIS_GAIA_OAUTH2_TOKEN_SERVICE_DELEGATE_H_
 #define GOOGLE_APIS_GAIA_OAUTH2_TOKEN_SERVICE_DELEGATE_H_
 
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "google_apis/gaia/gaia_auth_util.h"
 #include "google_apis/gaia/oauth2_token_service.h"
 #include "net/base/backoff_entry.h"
 
 namespace net {
 class URLRequestContextGetter;
 }
 
 // Abstract base class to fetch and maintain refresh tokens from various
 // entities. Concrete subclasses should implement RefreshTokenIsAvailable and
 // CreateAccessTokenFetcher properly.
 class OAuth2TokenServiceDelegate {
  public:
+  enum LoadCredentialsState {
+    LOAD_CREDENTIALS_UNKNOWN,
+    LOAD_CREDENTIALS_NOT_STARTED,
+    LOAD_CREDENTIALS_IN_PROGRESS,
+    LOAD_CREDENTIALS_FINISHED_WITH_SUCCESS,
+    LOAD_CREDENTIALS_FINISHED_WITH_DB_ERRORS,
+    LOAD_CREDENTIALS_FINISHED_WITH_DECRYPT_ERRORS,
+    LOAD_CREDENTIALS_FINISHED_WITH_UNKNOWN_ERRORS,
+  };
+
   OAuth2TokenServiceDelegate();
   virtual ~OAuth2TokenServiceDelegate();
 
   virtual OAuth2AccessTokenFetcher* CreateAccessTokenFetcher(
       const std::string& account_id,
       net::URLRequestContextGetter* getter,
       OAuth2AccessTokenConsumer* consumer) = 0;
 
   virtual bool RefreshTokenIsAvailable(const std::string& account_id) const = 0;
   virtual bool RefreshTokenHasError(const std::string& account_id) const;
@@ skipping 18 matching lines @@
   bool ValidateAccountId(const std::string& account_id) const;
 
   // Add or remove observers of this token service.
   void AddObserver(OAuth2TokenService::Observer* observer);
   void RemoveObserver(OAuth2TokenService::Observer* observer);
 
   // Returns a pointer to its instance of net::BackoffEntry if it has one, or
   // a nullptr otherwise.
   virtual const net::BackoffEntry* BackoffEntry() const;
 
+  // Diagnostic methods
+
+  // Returns the state of the load credentials operation.
+  virtual LoadCredentialsState GetLoadCredentialsState() const;
+
  protected:
   // Called by subclasses to notify observers.
   virtual void FireRefreshTokenAvailable(const std::string& account_id);
   virtual void FireRefreshTokenRevoked(const std::string& account_id);
   virtual void FireRefreshTokensLoaded();
 
   // Helper class to scope batch changes.
   class ScopedBatchChange {
    public:
     explicit ScopedBatchChange(OAuth2TokenServiceDelegate* delegate);
@@ skipping 18 matching lines @@
   void StartBatchChanges();
   void EndBatchChanges();
 
   // The depth of batch changes.
   int batch_change_depth_;
 
   DISALLOW_COPY_AND_ASSIGN(OAuth2TokenServiceDelegate);
 };
 
 #endif  // GOOGLE_APIS_GAIA_OAUTH2_TOKEN_SERVICE_DELEGATE_H_