content: Cleanup class/struct forward declarations

content/public/browser/download_url_parameters.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 CONTENT_PUBLIC_BROWSER_DOWNLOAD_URL_PARAMETERS_H_
 #define CONTENT_PUBLIC_BROWSER_DOWNLOAD_URL_PARAMETERS_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/public/browser/download_interrupt_reasons.h"
 #include "content/public/browser/download_save_info.h"
 #include "content/public/common/referrer.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "storage/browser/blob/blob_data_handle.h"
 #include "url/gurl.h"
 
 namespace content {
 
 class DownloadItem;
-class ResourceDispatcherHost;
 class WebContents;
 
 // Pass an instance of DownloadUrlParameters to DownloadManager::DownloadUrl()
 // to download the content at |url|. All parameters with setters are optional.
 // |referrer| and |referrer_encoding| are the referrer for the download. If
 // |prefer_cache| is true, then if the response to |url| is in the HTTP cache it
 // will be used without revalidation. If |post_id| is non-negative, then it
 // identifies the post transaction used to originally retrieve the |url|
 // resource - it also requires |prefer_cache| to be |true| since re-post'ing is
 // not done.  |save_info| specifies where the downloaded file should be saved,
@@ skipping 228 matching lines @@
   GURL url_;
   bool do_not_prompt_for_login_;
   std::unique_ptr<storage::BlobDataHandle> blob_data_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadUrlParameters);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DOWNLOAD_URL_PARAMETERS_H_