Create a message filter for message port messages. This allows a nice cleanu...

chrome/browser/renderer_host/resource_dispatcher_host.cc

Index: chrome/browser/renderer_host/resource_dispatcher_host.cc
===================================================================
--- chrome/browser/renderer_host/resource_dispatcher_host.cc	(revision 69724)
+++ chrome/browser/renderer_host/resource_dispatcher_host.cc	(working copy)
@@ -1518,20 +1518,14 @@
 
   // If the request is from the worker process, find a tab that owns the worker.
   if (info->process_type() == ChildProcessInfo::WORKER_PROCESS) {
-    const WorkerProcessHost::WorkerInstance* worker_instance =
-        WorkerService::GetInstance()->FindWorkerInstance(info->child_id());
-    if (!worker_instance) {
+    // Need to display some related UI for this network request - pick an
+    // arbitrary parent to do so.
+    if (!WorkerService::GetInstance()->GetRendererForWorker(
+            info->child_id(), render_process_host_id, render_view_host_id)) {
       *render_process_host_id = -1;
       *render_view_host_id = -1;
       return false;
     }
-    DCHECK(!worker_instance->worker_document_set()->IsEmpty());
-    const WorkerDocumentSet::DocumentInfoSet& parents =
-        worker_instance->worker_document_set()->documents();
-    // Need to display some related UI for this network request - pick an
-    // arbitrary parent to do so.
-    *render_process_host_id = parents.begin()->renderer_id();
-    *render_view_host_id = parents.begin()->render_view_route_id();
   } else {
     *render_process_host_id = info->child_id();
     *render_view_host_id = info->route_id();