Eliminate ProfileOAuth2TokenService being a BCKS.

chrome/browser/signin/mutable_profile_oauth2_token_service.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_SIGNIN_MUTABLE_PROFILE_OAUTH2_TOKEN_SERVICE_H_
 #define CHROME_BROWSER_SIGNIN_MUTABLE_PROFILE_OAUTH2_TOKEN_SERVICE_H_
 
 #include "chrome/browser/signin/profile_oauth2_token_service.h"
 #include "components/webdata/common/web_data_service_base.h"
 #include "components/webdata/common/web_data_service_consumer.h"
@@ skipping 42 matching lines @@
     std::string refresh_token_;
     GoogleServiceAuthError last_auth_error_;
 
     DISALLOW_COPY_AND_ASSIGN(AccountInfo);
   };
 
   // Maps the |account_id| of accounts known to ProfileOAuth2TokenService
   // to information about the account.
   typedef std::map<std::string, linked_ptr<AccountInfo> > AccountInfoMap;
 
-  friend class ProfileOAuth2TokenServiceFactory;
+  friend class ProfileOAuth2TokenServiceWrapperImpl;
 
   MutableProfileOAuth2TokenService();
   virtual ~MutableProfileOAuth2TokenService();
 
   // OAuth2TokenService implementation.
   virtual std::string GetRefreshToken(const std::string& account_id) OVERRIDE;
   virtual net::URLRequestContextGetter* GetRequestContext() OVERRIDE;
 
   AccountInfoMap& refresh_tokens() { return refresh_tokens_; }
 
@@ skipping 42 matching lines @@
   WebDataServiceBase::Handle web_data_service_request_;
 
   // The primary account id of this service's profile during the loading of
   // credentials.  This member is empty otherwise.
   std::string loading_primary_account_id_;
 
   DISALLOW_COPY_AND_ASSIGN(MutableProfileOAuth2TokenService);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_MUTABLE_PROFILE_OAUTH2_TOKEN_SERVICE_H_