Fix renderer hang caused when a synchronous XHR is disallowed for security...

chrome/browser/renderer_host/resource_dispatcher_host.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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #include "chrome/browser/renderer_host/resource_dispatcher_host.h"
 
 #include <vector>
 
@@ skipping 256 matching lines @@
     int route_id) {
   ChildProcessInfo::ProcessType process_type = receiver_->type();
   int process_id = receiver_->GetProcessId();
   URLRequestContext* context =
       receiver_->GetRequestContext(request_id, request_data);
   if (!context)
     context = Profile::GetDefaultRequestContext();
 
   if (is_shutdown_ ||
       !ShouldServiceRequest(process_type, process_id, request_data)) {
-    // Tell the renderer that this request was disallowed.
-    receiver_->Send(new ViewMsg_Resource_RequestComplete(
-        route_id,
-        request_id,
-        URLRequestStatus(URLRequestStatus::FAILED, net::ERR_ABORTED),
-        std::string()));  // No security info needed, connection was not
-                          // established.
+    URLRequestStatus status(URLRequestStatus::FAILED, net::ERR_ABORTED);
+    if (sync_result) {
+      SyncLoadResult result;
+      result.status = status;
+      ViewHostMsg_SyncLoad::WriteReplyParams(sync_result, result);
+      receiver_->Send(sync_result);
+    } else {
+      // Tell the renderer that this request was disallowed.
+      receiver_->Send(new ViewMsg_Resource_RequestComplete(
+          route_id,
+          request_id,
+          status,
+          std::string()));  // No security info needed, connection was not
+                            // established.
+    }
     return;
   }
 
   // Ensure the Chrome plugins are loaded, as they may intercept network
   // requests.  Does nothing if they are already loaded.
   // TODO(mpcomplete): This takes 200 ms!  Investigate parallelizing this by
   // starting the load earlier in a BG thread.
   plugin_service_->LoadChromePlugins(this);
 
   // Construct the event handler.
@@ skipping 1246 matching lines @@
     case ViewHostMsg_UploadProgress_ACK::ID:
     case ViewHostMsg_SyncLoad::ID:
       return true;
 
     default:
       break;
   }
 
   return false;
 }