Adding the AccessTokenFetcher and Environment class to the app remoting test

remoting/test/access_token_fetcher.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_ACCESS_TOKEN_FETCHER_H_
+#define REMOTING_TEST_ACCESS_TOKEN_FETCHER_H_
+
+#include "base/callback.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "google_apis/gaia/gaia_oauth_client.h"
+
+namespace remoting {
+namespace test {
+
+// Supplied by the client for each request to GAIA and returns valid tokens on
+// success or empty tokens on failure.
+typedef base::Callback<void(
+    const std::string& access_token,
+    const std::string& refresh_token)> AccessTokenCallback;
+
+// Retrieves an access token from either an authorization code or a refresh
+// token.  Destroying the AccessTokenFetcher while a request is outstanding will
+// cancel the request. It is safe to delete the fetcher from within a completion
+// callback.  Must be used from a thread running an IO message loop.
+// The public methods are virtual to allow for mocking and fakes.
+class AccessTokenFetcher : public gaia::GaiaOAuthClient::Delegate {
+ public:
+  AccessTokenFetcher();
+  ~AccessTokenFetcher() override;
+
+  // Retrieve an access token from a one time use authorization code.
+  virtual void GetAccessTokenFromAuthCode(const std::string& auth_code,
+                                          const AccessTokenCallback& callback);
+
+  // Retrieve an access token from a refresh token.
+  virtual void GetAccessTokenFromRefreshToken(
+      const std::string& refresh_token,
+      const AccessTokenCallback& callback);
+
+ private:
+  // gaia::GaiaOAuthClient::Delegate Interface.
+  void OnGetTokensResponse(const std::string& refresh_token,
+                           const std::string& access_token,
+                           int expires_in_seconds) override;
+  void OnRefreshTokenResponse(const std::string& access_token,
+                              int expires_in_seconds) override;
+  void OnGetUserEmailResponse(const std::string& user_email) override;
+  void OnGetUserIdResponse(const std::string& user_id) override;
+  void OnGetUserInfoResponse(
+      scoped_ptr<base::DictionaryValue> user_info) override;
+  void OnGetTokenInfoResponse(
+      scoped_ptr<base::DictionaryValue> token_info) override;
+  void OnOAuthError() override;
+  void OnNetworkError(int response_code) override;
+
+  // Updates |auth_client_| with a new GaiaOAuthClient instance.
+  void CreateNewGaiaOAuthClientInstance();
+
+  // Validates the retrieved access token.
+  void ValidateAccessToken();
+
+  // Caller-supplied callback used to return valid tokens on success or empty
+  // tokens on failure.
+  AccessTokenCallback access_token_callback_;
+
+  // Retrieved based on the |refresh_token_|.
+  std::string access_token_;
+
+  // Supplied by the caller or retrieved from a caller-supplied auth token.
+  std::string refresh_token_;
+
+  // Holds the client id, secret, and redirect url used to make
+  // the Gaia service request.
+  gaia::OAuthClientInfo oauth_client_info_;
+
+  // Used to make token requests to GAIA.
+  scoped_ptr<gaia::GaiaOAuthClient> auth_client_;
+
+  DISALLOW_COPY_AND_ASSIGN(AccessTokenFetcher);
+};
+
+}  // namespace test
+}  // namespace remoting
+
+#endif  // REMOTING_TEST_ACCESS_TOKEN_FETCHER_H_