Remove GaiaOauthClient and GaiaUserEmailFetcher from remoting.

remoting/host/gaia_oauth_client.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.
-
-#ifndef REMOTING_HOST_GAIA_OAUTH_CLIENT_H_
-#define REMOTING_HOST_GAIA_OAUTH_CLIENT_H_
-
-#include <string>
-
-#include "base/memory/ref_counted.h"
-#include "base/message_loop_proxy.h"
-
-namespace net {
-class URLRequestContextGetter;
-}  // namespace net
-
-// A helper class to get and refresh OAuth tokens given an authorization code.
-//
-// TODO(jamiewalch): This is copied from chrome/common/net to avoid a dependency
-// on chrome. It would be better for this class to be moved into net to avoid
-// this duplication.
-namespace remoting {
-
-struct OAuthClientInfo {
-  std::string client_id;
-  std::string client_secret;
-};
-
-struct OAuthProviderInfo {
-  static OAuthProviderInfo GetDefault();
-
-  std::string access_token_url;
-  std::string user_info_url;
-};
-
-class GaiaOAuthClient {
- public:
-  class Delegate {
-   public:
-    virtual ~Delegate() { }
-
-    // Invoked on a successful response to the RefreshToken request.
-    virtual void OnRefreshTokenResponse(const std::string& user_email,
-                                        const std::string& access_token,
-                                        int expires_in_seconds) = 0;
-    // Invoked when there is an OAuth error with one of the requests.
-    virtual void OnOAuthError() = 0;
-    // Invoked when there is a network error or upon receiving an
-    // invalid response.
-    virtual void OnNetworkError(int response_code) = 0;
-  };
-
-  GaiaOAuthClient(const OAuthProviderInfo& provider_info,
-                  net::URLRequestContextGetter* context_getter);
-  ~GaiaOAuthClient();
-
-  void RefreshToken(const OAuthClientInfo& oauth_client_info,
-                    const std::string& refresh_token,
-                    Delegate* delegate);
-
- private:
-  // The guts of the implementation live in this class.
-  class Core;
-  scoped_refptr<Core> core_;
-  DISALLOW_COPY_AND_ASSIGN(GaiaOAuthClient);
-};
-
-}  // namespace remoting
-
-#endif  // CHROME_COMMON_NET_GAIA_GAIA_OAUTH_CLIENT_H_