ChromeOS user_manager: move all KnownUser code to separate file.

chrome/browser/chromeos/login/signin/token_handle_util.h

 // Copyright 2015 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_CHROMEOS_LOGIN_SIGNIN_TOKEN_HANDLE_UTIL_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SIGNIN_TOKEN_HANDLE_UTIL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "components/signin/core/account_id/account_id.h"
 #include "google_apis/gaia/gaia_oauth_client.h"
 
 class AccountId;
 
 namespace base {
 class DictionaryValue;
 }
 
-namespace user_manager {
-class UserManager;
-}
-
 // This class is responsible for operations with External Token Handle.
 // Handle is an extra token associated with OAuth refresh token that have
 // exactly same lifetime. It is not secure, and it's only purpose is checking
 // validity of corresponding refresh token in the insecure environment.
 class TokenHandleUtil {
  public:
-  explicit TokenHandleUtil(user_manager::UserManager* user_manager);
+  TokenHandleUtil();
   ~TokenHandleUtil();
 
   enum TokenHandleStatus { VALID, INVALID, UNKNOWN };
 
   using TokenValidationCallback =
       base::Callback<void(const AccountId&, TokenHandleStatus)>;
 
   // Returns true if UserManager has token handle associated with |account_id|.
   bool HasToken(const AccountId& account_id);
 
@@ skipping 36 matching lines @@
     std::string token_;
     base::TimeTicks tokeninfo_response_start_time_;
     TokenValidationCallback callback_;
 
     DISALLOW_COPY_AND_ASSIGN(TokenDelegate);
   };
 
   void OnValidationComplete(const std::string& token);
   void OnObtainTokenComplete(const AccountId& account_id);
 
-  // UserManager that stores corresponding user data.
-  user_manager::UserManager* user_manager_;
-
   // Map of pending check operations.
   base::ScopedPtrHashMap<std::string, scoped_ptr<TokenDelegate>>
       validation_delegates_;
 
   // Map of pending obtain operations.
   base::ScopedPtrHashMap<AccountId, scoped_ptr<TokenDelegate>>
       obtain_delegates_;
 
   // Instance of GAIA Client.
   scoped_ptr<gaia::GaiaOAuthClient> gaia_client_;
 
   base::WeakPtrFactory<TokenHandleUtil> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TokenHandleUtil);
 };
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SIGNIN_TOKEN_HANDLE_UTIL_H_