Build a new TokenCacheService so I can stop using TokenService for something it wasn't designed for.

chrome/browser/signin/token_service.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.
 //
 // The TokenService will supply authentication tokens for any service that
 // needs it, such as sync. Whenever the user logs in, a controller watching
 // the token service is expected either to call ClientLogin to derive a new
 // SID and LSID, or to use GAIA OAuth requests to derive an OAuth1 access
 // token for the OAuthLogin scope.  Whenever such credentials are available,
 // the TokenService should be updated with new credentials.  The controller
@@ skipping 98 matching lines @@
       signin_internals_util::SigninDiagnosticsObserver* observer);
 
   // Initialize this token service with a request source
   // (usually from a GaiaAuthConsumer constant), and the profile.
   // Typically you'd then update the credentials.
   void Initialize(const char* const source, Profile* profile);
 
   // Used to determine whether Initialize() has been called.
   bool Initialized() const { return !source_.empty(); }
 
-  // Add a token not supported by a fetcher.
-  void AddAuthTokenManually(const std::string& service,
-                            const std::string& auth_token);
-
   // Update ClientLogin credentials in the token service.
   // Afterwards you can StartFetchingTokens.
   void UpdateCredentials(
       const GaiaAuthConsumer::ClientLoginResult& credentials);
 
   // Update credentials in the token service with oauth2 tokens.
   // Afterwards you can StartFetchingTokens.
   void UpdateCredentialsWithOAuth2(
       const GaiaAuthConsumer::ClientOAuthResult& credentials);
 
@@ skipping 124 matching lines @@
 
   friend class TokenServiceTest;
   FRIEND_TEST_ALL_PREFIXES(TokenServiceTest, LoadTokensIntoMemoryBasic);
   FRIEND_TEST_ALL_PREFIXES(TokenServiceTest, LoadTokensIntoMemoryAdvanced);
   FRIEND_TEST_ALL_PREFIXES(TokenServiceTest, FullIntegrationNewServicesAdded);
 
   DISALLOW_COPY_AND_ASSIGN(TokenService);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_TOKEN_SERVICE_H_