Support dragging a virtual file out of the browser.

chrome/browser/download/download_file.cc

 // Copyright (c) 2006-2008 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.
 
 #include "chrome/browser/download/download_file.h"
 
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/stl_util-inl.h"
 #include "base/string_util.h"
@@ skipping 411 matching lines @@
   if (manager)
     manager->DownloadFinished(id, bytes_so_far);
   RemoveDownload(id, manager);
   RemoveDownloadFromUIProgress(id);
 }
 
 void DownloadFileManager::DownloadUrl(
     const GURL& url,
     const GURL& referrer,
     const std::string& referrer_charset,
+    const FilePath& save_file_path,
     int render_process_host_id,
     int render_view_id,
     URLRequestContextGetter* request_context_getter) {
   DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
   ChromeThread::PostTask(
         ChromeThread::IO, FROM_HERE,
         NewRunnableMethod(this,
                           &DownloadFileManager::OnDownloadUrl,
                           url,
                           referrer,
                           referrer_charset,
+                          save_file_path,
                           render_process_host_id,
                           render_view_id,
                           request_context_getter));
 }
 
 // Relate a download ID to its owning DownloadManager.
 DownloadManager* DownloadFileManager::LookupManager(int download_id) {
   DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
   DownloadManagerMap::iterator it = managers_.find(download_id);
   if (it != managers_.end())
@@ skipping 64 matching lines @@
 }
 
 
 // Notifications from the UI thread and run on the IO thread
 
 // Initiate a request for URL to be downloaded.
 void DownloadFileManager::OnDownloadUrl(
     const GURL& url,
     const GURL& referrer,
     const std::string& referrer_charset,
+    const FilePath& save_file_path,
     int render_process_host_id,
     int render_view_id,
     URLRequestContextGetter* request_context_getter) {
   DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO));
 
   URLRequestContext* context = request_context_getter->GetURLRequestContext();
   context->set_referrer_charset(referrer_charset);
 
   resource_dispatcher_host_->BeginDownload(url,
                                            referrer,
+                                           save_file_path,
                                            render_process_host_id,
                                            render_view_id,
                                            context);
 }
 
 // Actions from the UI thread and run on the download thread
 
 // Open a download, or show it in a file explorer window. We run on this
 // thread to avoid blocking the UI with (potentially) slow Shell operations.
 // TODO(paulg): File 'stat' operations.
@@ skipping 80 matching lines @@
       NewRunnableMethod(this, &DownloadFileManager::StopUpdateTimer));
   }
 }
 
 // static
 void DownloadFileManager::DeleteFile(const FilePath& path) {
   // Make sure we only delete files.
   if (!file_util::DirectoryExists(path))
     file_util::Delete(path, false);
 }