Eliminate usage of PO2TS::GetPrimaryAccountID() in UbertokenFetcher.

chrome/browser/signin/ubertoken_fetcher.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 CHROME_BROWSER_SIGNIN_UBERTOKEN_FETCHER_H_
 #define CHROME_BROWSER_SIGNIN_UBERTOKEN_FETCHER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "google_apis/gaia/gaia_auth_consumer.h"
 #include "google_apis/gaia/oauth2_token_service.h"
@@ skipping 20 matching lines @@
   virtual void OnUbertokenFailure(const GoogleServiceAuthError& error) {}
 };
 
 // Allows to retrieve an uber-auth token.
 class UbertokenFetcher : public GaiaAuthConsumer,
                          public OAuth2TokenService::Consumer {
  public:
   UbertokenFetcher(Profile* profile, UbertokenConsumer* consumer);
   virtual ~UbertokenFetcher();
 
-  // Start fetching the token.
-  void StartFetchingToken();
+  // Start fetching the token for |account_id|.
   virtual void StartFetchingToken(const std::string& account_id);
 
   // Overriden from GaiaAuthConsumer
   virtual void OnUberAuthTokenSuccess(const std::string& token) OVERRIDE;
   virtual void OnUberAuthTokenFailure(
       const GoogleServiceAuthError& error) OVERRIDE;
 
   // Overriden from OAuth2TokenService::Consumer:
   virtual void OnGetTokenSuccess(const OAuth2TokenService::Request* request,
                                  const std::string& access_token,
                                  const base::Time& expiration_time) OVERRIDE;
   virtual void OnGetTokenFailure(const OAuth2TokenService::Request* request,
                                  const GoogleServiceAuthError& error) OVERRIDE;
 
  private:
   Profile* profile_;
   UbertokenConsumer* consumer_;
   scoped_ptr<GaiaAuthFetcher> gaia_auth_fetcher_;
   scoped_ptr<OAuth2TokenService::Request> access_token_request_;
 
   DISALLOW_COPY_AND_ASSIGN(UbertokenFetcher);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_UBERTOKEN_FETCHER_H_