Make OAuth2TokenService::Request class multi-login aware.

chrome/browser/signin/profile_oauth2_token_service_request.h

 // Copyright 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_PROFILE_OAUTH2_TOKEN_SERVICE_REQUEST_H_
 #define CHROME_BROWSER_SIGNIN_PROFILE_OAUTH2_TOKEN_SERVICE_REQUEST_H_
 
 #include <set>
 #include <string>
 
@@ skipping 16 matching lines @@
   // Creates and starts a request for |account_id| and |scopes|.
   // Uses the primary account id if |account_id| is the empty string.
   static ProfileOAuth2TokenServiceRequest* CreateAndStart(
       Profile* profile,
       const std::string& account_id,
       const OAuth2TokenService::ScopeSet& scopes,
       OAuth2TokenService::Consumer* consumer);
 
   virtual ~ProfileOAuth2TokenServiceRequest();
 
+  // Overridden from Request:
+  virtual std::string GetAccountId() const OVERRIDE;
+
  private:
   class Core;
   friend class Core;
 
   ProfileOAuth2TokenServiceRequest(Profile* profile,
                                    const std::string& account_id,
                                    const OAuth2TokenService::ScopeSet& scopes,
                                    OAuth2TokenService::Consumer* consumer);
+
   OAuth2TokenService::Consumer* const consumer_;
   scoped_refptr<Core> core_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileOAuth2TokenServiceRequest);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_PROFILE_OAUTH2_TOKEN_SERVICE_REQUEST_H_