DevTools: Add workerShadowPageLoaded method to shared/service worker clients for further plumbing i…

public/web/WebServiceWorkerContextClient.h

Index: public/web/WebServiceWorkerContextClient.h
diff --git a/public/web/WebServiceWorkerContextClient.h b/public/web/WebServiceWorkerContextClient.h
index 21199d6fd8dfe0c4d320a0b80544c290e22ca399..d5996f815d4ad6f8a30b4ebe801df36f45ca3868 100644
--- a/public/web/WebServiceWorkerContextClient.h
+++ b/public/web/WebServiceWorkerContextClient.h
@@ -71,6 +71,9 @@ public:
     // WebEmbeddedWorker.resumeAfterDownload() is invoked.
     virtual void didPauseAfterDownload() { }
 
+    // ServiceWorker has prepared everything for script loading and is now ready for inspection.
+    virtual void workerReadyForInspection() { }
+
     // A new WorkerGlobalScope is created and started to run on the
     // worker thread.
     // This also gives back a proxy to the client to talk to the