ServiceWorker: Change worker script fetch error code(2/3).

content/browser/service_worker/service_worker_version.h

Index: content/browser/service_worker/service_worker_version.h
diff --git a/content/browser/service_worker/service_worker_version.h b/content/browser/service_worker/service_worker_version.h
index 9d0b34235f22edee8d6260a63df88d3164c2dff9..8e793fc4a32c94229887d9a62f4602a90eae5ba0 100644
--- a/content/browser/service_worker/service_worker_version.h
+++ b/content/browser/service_worker/service_worker_version.h
@@ -219,6 +219,9 @@ class CONTENT_EXPORT ServiceWorkerVersion
   void Doom();
   bool is_doomed() const { return is_doomed_; }
 
+  // Notifies start callbacks that an URL request error occurred.
+  void NotifyStartWorkerURLRequestError(ServiceWorkerStatusCode status);

[michaeln, 2014/09/13 01:21:34]

The 'start callbacks' are already being called in these cases. Adding a special
case code paths to include extra error info doesn't seem needed. Can we keep the
existing control flow, but have start callback detect the more nuanced error
condition?

[xiang, 2014/09/16 06:24:31]

Done.

+
  private:
   friend class base::RefCounted<ServiceWorkerVersion>;
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerControlleeRequestHandlerTest,