net: Cleanup class/struct forward declarations

net/url_request/url_fetcher.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 NET_URL_REQUEST_URL_FETCHER_H_
 #define NET_URL_REQUEST_URL_FETCHER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 14 matching lines @@
 class TaskRunner;
 class TimeDelta;
 }
 
 namespace url {
 class Origin;
 }
 
 namespace net {
 class HostPortPair;
-class HttpRequestHeaders;
 class HttpResponseHeaders;
 class URLFetcherDelegate;
 class URLFetcherResponseWriter;
 class URLRequestContextGetter;
 class URLRequestStatus;
 
 // To use this class, create an instance with the desired URL and a pointer to
 // the object to be notified when the URL has been loaded:
 //   std::unique_ptr<URLFetcher> fetcher =
 //       URLFetcher::Create(GURL("http://www.google.com"),
@@ skipping 284 matching lines @@
   // be removed once the URLFetcher is destroyed.  User should not take
   // ownership more than once, or call this method after taking ownership.
   virtual bool GetResponseAsFilePath(
       bool take_ownership,
       base::FilePath* out_response_path) const = 0;
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_FETCHER_H_