SW: Propagate errors/exceptions from service worker to browser

content/renderer/service_worker/embedded_worker_context_client.h

Index: content/renderer/service_worker/embedded_worker_context_client.h
diff --git a/content/renderer/service_worker/embedded_worker_context_client.h b/content/renderer/service_worker/embedded_worker_context_client.h
index b5267b1993c2ade98c7a4f4a1dbd1c63ab9bd3da..76f5d9570d68f5d5f22dafaa03b3b83b39e4e013 100644
--- a/content/renderer/service_worker/embedded_worker_context_client.h
+++ b/content/renderer/service_worker/embedded_worker_context_client.h
@@ -61,6 +61,10 @@ class EmbeddedWorkerContextClient
   virtual void workerContextFailedToStart();
   virtual void workerContextStarted(blink::WebServiceWorkerContextProxy* proxy);
   virtual void workerContextDestroyed();
+  virtual void reportException(const blink::WebString& error_message,
+                               int line_number,
+                               int column_number,
+                               const blink::WebString& source_url);
   virtual void didHandleActivateEvent(int request_id,
                                       blink::WebServiceWorkerEventResult);
   virtual void didHandleInstallEvent(int request_id,