remoting: Cleanup class/struct fwd declarations

remoting/host/setup/gaia_oauth_client.h

 // Copyright 2013 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_SETUP_GAIA_OAUTH_CLIENT_H_
 #define REMOTING_HOST_SETUP_GAIA_OAUTH_CLIENT_H_
 
 #include <queue>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "google_apis/gaia/gaia_oauth_client.h"
 #include "net/url_request/url_request_context_getter.h"
 
 #include "remoting/host/setup/oauth_client.h"
 
-namespace net {
-class URLRequestContext;
-}
-
 namespace remoting {
 
 // A wrapper around gaia::GaiaOAuthClient that provides a more
 // convenient interface, with queueing of requests and a callback
 // rather than a delegate.
 class GaiaOAuthClient : public OAuthClient,
                         public gaia::GaiaOAuthClient::Delegate {
  public:
   GaiaOAuthClient(
       scoped_refptr<net::URLRequestContextGetter> url_request_context_getter);
@@ skipping 45 matching lines @@
   std::string refresh_token_;
   bool need_user_email_;
   CompletionCallback on_done_;
 
   DISALLOW_COPY_AND_ASSIGN(GaiaOAuthClient);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_SETUP_GAIA_OAUTH_CLIENT_H_