Inform the client when the Service Worker rejects an install event

public/web/WebServiceWorkerContextClient.h

Index: public/web/WebServiceWorkerContextClient.h
diff --git a/public/web/WebServiceWorkerContextClient.h b/public/web/WebServiceWorkerContextClient.h
index 540cb061239c36da46c3e21c376eec706843c03c..42edd0c06e132e5ff795f98838281cd9f2e4fd35 100644
--- a/public/web/WebServiceWorkerContextClient.h
+++ b/public/web/WebServiceWorkerContextClient.h
@@ -32,6 +32,7 @@
 #define WebServiceWorkerContextClient_h
 
 #include "WebWorkerPermissionClientProxy.h"
+#include "public/platform/WebServiceWorkerEventResult.h"
 
 namespace blink {
 
@@ -81,6 +82,10 @@ public:
     // via WebServiceWorkerContextProxy) is handled by the ServiceWorker's
     // script context.
     virtual void didHandleInstallEvent(int installEventID) { }
+    virtual void didHandleInstallEvent(int installEventID, blink::WebServiceWorkerEventResult result)
+    {
+        didHandleInstallEvent(installEventID);
+    }
 
     // ServiceWorker specific methods. Called after FetchEvent is handled by the
     // ServiceWorker's script context. When no response is provided, the browser