Lower the priority of shared workers

content/browser/worker_host/worker_process_host.h

Index: content/browser/worker_host/worker_process_host.h
diff --git a/content/browser/worker_host/worker_process_host.h b/content/browser/worker_host/worker_process_host.h
index dd1d58fe322c9ac7a5e1a7ea045497247cda5b4f..4a86b86dbdaf24232cbed5edc686c412389c7c00 100644
--- a/content/browser/worker_host/worker_process_host.h
+++ b/content/browser/worker_host/worker_process_host.h
@@ -158,6 +158,9 @@ class WorkerProcessHost : public BrowserChildProcessHostDelegate,
   // Terminates the given worker, i.e. based on a UI action.
   CONTENT_EXPORT void TerminateWorker(int worker_route_id);
 
+  // Callers can reduce the WorkerProcess' priority.
+  void SetBackgrounded(bool backgrounded);
+
   CONTENT_EXPORT const ChildProcessData& GetData();
 
   typedef std::list<WorkerInstance> Instances;
@@ -167,6 +170,8 @@ class WorkerProcessHost : public BrowserChildProcessHostDelegate,
     return resource_context_;
   }
 
+  bool process_launched() const { return process_launched_; }
+
  protected:
   friend class WorkerServiceImpl;
 
@@ -221,6 +226,7 @@ class WorkerProcessHost : public BrowserChildProcessHostDelegate,
   scoped_refptr<WorkerMessageFilter> worker_message_filter_;
 
   scoped_ptr<BrowserChildProcessHostImpl> process_;
+  bool process_launched_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkerProcessHost);
 };