Change DownloadProcessHandle to be more of an encapsulated class.

chrome/browser/download/download_util.cc

 // Copyright (c) 2011 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.
 //
 // Download utility implementation
 
 #include "chrome/browser/download/download_util.h"
 
 #if defined(OS_WIN)
 #include <shobjidl.h>
@@ skipping 831 matching lines @@
 
   rdh->BeginDownload(url,
                      referrer,
                      save_info,
                      true,  // Show "Save as" UI.
                      render_process_host_id,
                      render_view_id,
                      *context);
 }
 
-static void CancelDownloadRequestOnIOThread(
-    ResourceDispatcherHost* rdh, DownloadProcessHandle process_handle) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-  // |rdh| may be NULL in unit tests.
-  if (!rdh)
-    return;
-
-  rdh->CancelRequest(process_handle.child_id(),
-                     process_handle.request_id(),
-                     false);
-}
-
-void CancelDownloadRequest(ResourceDispatcherHost* rdh,
-                           DownloadProcessHandle process_handle) {
-  BrowserThread::PostTask(
-      BrowserThread::IO, FROM_HERE,
-      NewRunnableFunction(&download_util::CancelDownloadRequestOnIOThread,
-                          rdh, process_handle));
-}
-
 void NotifyDownloadInitiated(int render_process_id, int render_view_id) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   RenderViewHost* rvh = RenderViewHost::FromID(render_process_id,
                                                render_view_id);
   if (!rvh)
     return;
 
   NotificationService::current()->Notify(NotificationType::DOWNLOAD_INITIATED,
                                          Source<RenderViewHost>(rvh),
                                          NotificationService::NoDetails());
@@ skipping 41 matching lines @@
 FilePath GetCrDownloadPath(const FilePath& suggested_path) {
   FilePath::StringType file_name;
   base::SStringPrintf(
       &file_name,
       PRFilePathLiteral FILE_PATH_LITERAL(".crdownload"),
       suggested_path.value().c_str());
   return FilePath(file_name);
 }
 
 }  // namespace download_util