Fix various issues in RedirectToFileResourceHandler.

content/browser/loader/async_resource_handler.cc

 // 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.
 
 #include "content/browser/loader/async_resource_handler.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 179 matching lines @@
 
   if (info->GetResourceType() == ResourceType::MAIN_FRAME && host_zoom_map) {
     const GURL& request_url = request()->url();
     info->filter()->Send(new ViewMsg_SetZoomLevelForLoadingURL(
         info->GetRouteID(),
         request_url, host_zoom_map->GetZoomLevelForHostAndScheme(
             request_url.scheme(),
             net::GetHostOrSpecFromURL(request_url))));
   }
 
+  // If the parent handler downloaded the resource to a file, grant the child
+  // read permissions on it. Note: there is similar logic in
+  // SyncResourceHandler.
+  if (!response->head.download_file_path.empty()) {
+    rdh_->RegisterDownloadedTempFile(
+        info->GetChildID(), info->GetRequestID(),
+        response->head.download_file_path);
+  }
+
   response->head.request_start = request()->creation_time();
   response->head.response_start = TimeTicks::Now();
   info->filter()->Send(new ResourceMsg_ReceivedResponse(request_id,
                                                         response->head));
   sent_received_response_msg_ = true;
 
   if (request()->response_info().metadata.get()) {
     std::vector<char> copy(request()->response_info().metadata->data(),
                            request()->response_info().metadata->data() +
                                request()->response_info().metadata->size());
@@ skipping 178 matching lines @@
     request()->LogUnblocked();
     controller()->Resume();
   }
 }
 
 void AsyncResourceHandler::OnDefer() {
   request()->LogBlockedBy("AsyncResourceHandler");
 }
 
 }  // namespace content