Cleanup remaining class/struct fwd declarations

headless/public/util/http_url_fetcher.h

 // Copyright 2016 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 HEADLESS_PUBLIC_UTIL_HTTP_URL_FETCHER_H_
 #define HEADLESS_PUBLIC_UTIL_HTTP_URL_FETCHER_H_
 
 #include "base/macros.h"
 #include "headless/public/util/url_fetcher.h"
 
 namespace net {
 class URLRequestContext;
-class URLRequestJobFactory;
 }  // namespace
 
 namespace headless {
 
 // A simple URLFetcher that uses a net::URLRequestContext to as a back end for
 // http(s) fetches.
 class HttpURLFetcher : public URLFetcher {
  public:
   explicit HttpURLFetcher(const net::URLRequestContext* url_request_context);
   ~HttpURLFetcher() override;
 
   // URLFetcher implementation:
   void StartFetch(const GURL& rewritten_url,
                   const std::string& method,
                   const net::HttpRequestHeaders& request_headers,
                   ResultListener* result_listener) override;
 
  private:
   class Delegate;
 
   const net::URLRequestContext* url_request_context_;
   std::unique_ptr<Delegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpURLFetcher);
 };
 
 }  // namespace headless
 
 #endif  // HEADLESS_PUBLIC_UTIL_HTTP_URL_FETCHER_H_