Refactored code to allow associating workers with multiple renderers.

chrome/renderer/webworker_base.cc

Index: chrome/renderer/webworker_base.cc
diff --git a/chrome/renderer/webworker_base.cc b/chrome/renderer/webworker_base.cc
index e32026c2506840aef58e3310579af892941bbf82..e78ef6481e7b99cd23086545a265df1ced6b4f5e 100644
--- a/chrome/renderer/webworker_base.cc
+++ b/chrome/renderer/webworker_base.cc
@@ -19,11 +19,13 @@ using WebKit::WebWorkerClient;
 
 WebWorkerBase::WebWorkerBase(
     ChildThread* child_thread,
+    unsigned long long document_id,
     int route_id,
     int render_view_route_id)
     : route_id_(route_id),
       render_view_route_id_(render_view_route_id),
-      child_thread_(child_thread) {
+      child_thread_(child_thread),
+      document_id_(document_id) {
   if (route_id_ != MSG_ROUTING_NONE)
     child_thread_->AddRoute(route_id_, this);
 }
@@ -54,8 +56,14 @@ void WebWorkerBase::CreateWorkerContext(const GURL& script_url,
                                         const string16& user_agent,
                                         const string16& source_code) {
   DCHECK(route_id_ == MSG_ROUTING_NONE);
+  ViewHostMsg_CreateWorker_Params params;
+  params.url = script_url;
+  params.is_shared = is_shared;
+  params.name = name;
+  params.document_id = document_id_;
+  params.render_view_route_id = render_view_route_id_;
   IPC::Message* create_message = new ViewHostMsg_CreateWorker(
-      script_url, is_shared, name, render_view_route_id_, &route_id_);
+      params, &route_id_);
   child_thread_->Send(create_message);
   if (route_id_ == MSG_ROUTING_NONE)
     return;