DevTools: prepare workers for DevToolsManager::Attach(Detach)ClientHost removal.

content/browser/devtools/worker_devtools_manager.h

Index: content/browser/devtools/worker_devtools_manager.h
diff --git a/content/browser/devtools/worker_devtools_manager.h b/content/browser/devtools/worker_devtools_manager.h
index 13ef33be9a62baced808b19211a0276435e73fd3..cebb84523bcdcf0dcc577752a5ce2d48c6785707 100644
--- a/content/browser/devtools/worker_devtools_manager.h
+++ b/content/browser/devtools/worker_devtools_manager.h
@@ -71,10 +71,6 @@ class WorkerDevToolsManager {
       int worker_process_id,
       int worker_route_id,
       const std::string& state);
-  static void NotifyWorkerDestroyedOnIOThread(int worker_process_id,
-                                              int worker_route_id);
-  static void NotifyWorkerDestroyedOnUIThread(int worker_process_id,
-                                              int worker_route_id);
   static void SendResumeToWorker(const WorkerId& id);
 
   InspectedWorkersList inspected_workers_;