Refactored code to allow associating workers with multiple renderers.

chrome/browser/worker_host/worker_service.h

Index: chrome/browser/worker_host/worker_service.h
diff --git a/chrome/browser/worker_host/worker_service.h b/chrome/browser/worker_host/worker_service.h
index 5db6eee24b7a6c2b972ea29a818a8b4bc5787bba..eec45a05c5673bb095140c4debd4e7751adc8eef 100644
--- a/chrome/browser/worker_host/worker_service.h
+++ b/chrome/browser/worker_host/worker_service.h
@@ -30,6 +30,7 @@ class WorkerService : public NotificationObserver {
                     bool is_shared,
                     bool is_off_the_record,
                     const string16& name,
+                    unsigned long long document_id,
                     int renderer_pid,
                     int render_view_route_id,
                     IPC::Message::Sender* sender,
@@ -43,6 +44,8 @@ class WorkerService : public NotificationObserver {
                           const string16& name,
                           bool off_the_record,
                           unsigned long long document_id,
+                          int renderer_pid,
+                          int render_view_route_id,
                           IPC::Message::Sender* sender,
                           int sender_route_id,
                           bool* url_mismatch);
@@ -101,6 +104,12 @@ class WorkerService : public NotificationObserver {
   bool CanCreateWorkerProcess(
       const WorkerProcessHost::WorkerInstance& instance);
 
+  // Checks if the tab associated with the passed RenderView can create a
+  // worker process based on the process limit when we're using a strategy of
+  // one worker per process.
+  bool TabCanCreateWorkerProcess(
+      int renderer_id, int render_view_route_id, bool* hit_total_worker_limit);
+
   // NotificationObserver interface.
   void Observe(NotificationType type,
                const NotificationSource& source,