Fix sign-in error strings.

chrome/browser/extensions/api/identity/account_tracker.h

 // Copyright 2013 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_EXTENSIONS_API_IDENTITY_ACCOUNT_TRACKER_H_
 #define CHROME_BROWSER_EXTENSIONS_API_IDENTITY_ACCOUNT_TRACKER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 51 matching lines @@
   // OAuth2TokenService::Observer implementation.
   virtual void OnRefreshTokenAvailable(const std::string& account_key) OVERRIDE;
   virtual void OnRefreshTokenRevoked(const std::string& account_key) OVERRIDE;
 
   void OnUserInfoFetchSuccess(AccountIdFetcher* fetcher,
                               const std::string& gaia_id);
   void OnUserInfoFetchFailure(AccountIdFetcher* fetcher);
 
   // AuthStatusProvider implementation.
   virtual std::string GetAccountId() const OVERRIDE;
+  virtual std::string GetUsername() const OVERRIDE;
   virtual GoogleServiceAuthError GetAuthStatus() const OVERRIDE;
 
   // SigninManagerBase::Observer implementation.
   virtual void GoogleSigninSucceeded(const std::string& username,
                                      const std::string& password) OVERRIDE;
   virtual void GoogleSignedOut(const std::string& username) OVERRIDE;
 
  private:
   struct AccountState {
     AccountIds ids;
@@ skipping 51 matching lines @@
   AccountTracker* tracker_;
   const std::string account_key_;
 
   scoped_ptr<OAuth2TokenService::Request> login_token_request_;
   scoped_ptr<gaia::GaiaOAuthClient> gaia_oauth_client_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IDENTITY_ACCOUNT_TRACKER_H_