[sync]: add ManagedUserSigninManagerWrapper and pass to ProfileSyncService

chrome/browser/managed_mode/managed_user_signin_manager_wrapper.h

+// Copyright 2014 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_MANAGED_MODE_MANAGED_USER_SIGNIN_MANAGER_WRAPPER_H_
+#define CHROME_BROWSER_MANAGED_MODE_MANAGED_USER_SIGNIN_MANAGER_WRAPPER_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+
+class SigninManagerBase;
+
+// Some chrome cloud services support managed users as well as normally
+// authenticated users that sign in through SigninManager.  To facilitate
+// getting the "effective" username and account identifiers, services can
+// use this class to wrap the SigninManager and return managed user account
+// information when appropriate.
+class ManagedUserSigninManagerWrapper {
+ public:
+  explicit ManagedUserSigninManagerWrapper(SigninManagerBase* original);
+  ~ManagedUserSigninManagerWrapper();
+
+  std::string GetEffectiveUsername() const;
+  std::string GetAccountIdToUse() const;
+
+  SigninManagerBase* GetOriginal();
+
+ private:
+  SigninManagerBase* original_;
+  DISALLOW_COPY_AND_ASSIGN(ManagedUserSigninManagerWrapper);
+};
+
+#endif  // CHROME_BROWSER_MANAGED_MODE_MANAGED_USER_SIGNIN_MANAGER_WRAPPER_H_