Adding the AccessTokenFetcher and Environment class to the app remoting test

remoting/test/refresh_token_store.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 REMOTING_TEST_REFRESH_TOKEN_STORE_H_
+#define REMOTING_TEST_REFRESH_TOKEN_STORE_H_
+
+#include <string>
+
+#include "base/memory/scoped_ptr.h"
+
+namespace remoting {
+namespace test {
+
+// Used to store and retrieve refresh tokens.  This interface is provided to
+// allow for stubbing out the storage mechanism for testing.
+class RefreshTokenStore {
+ public:
+  RefreshTokenStore() {}
+  virtual ~RefreshTokenStore() {}
+
+  virtual std::string FetchRefreshToken() = 0;
+  virtual bool StoreRefreshToken(const std::string& refresh_token) = 0;
+
+  // Returns a RefreshTokenStore which reads/writes to a user specific token
+  // file on the local disk.
+  static scoped_ptr<RefreshTokenStore> OnDisk(const std::string& user_name);
+};
+
+}  // namespace test
+}  // namespace remoting
+
+#endif  // REMOTING_TEST_REFRESH_TOKEN_STORE_H_