Report an error message when an update job results in an error.

webkit/appcache/appcache_frontend_impl.cc

Index: webkit/appcache/appcache_frontend_impl.cc
===================================================================
--- webkit/appcache/appcache_frontend_impl.cc	(revision 52160)
+++ webkit/appcache/appcache_frontend_impl.cc	(working copy)
@@ -34,6 +34,7 @@
 void AppCacheFrontendImpl::OnEventRaised(const std::vector<int>& host_ids,
                                          EventID event_id) {
   DCHECK(event_id != PROGRESS_EVENT);  // See OnProgressEventRaised.
+  DCHECK(event_id != ERROR_EVENT);  // See OnErrorEventRaised.
   for (std::vector<int>::const_iterator i = host_ids.begin();
        i != host_ids.end(); ++i) {
     WebApplicationCacheHostImpl* host = GetHost(*i);
@@ -53,6 +54,17 @@
   }
 }
 
+void AppCacheFrontendImpl::OnErrorEventRaised(
+    const std::vector<int>& host_ids,
+    const std::string& message) {
+  for (std::vector<int>::const_iterator i = host_ids.begin();
+       i != host_ids.end(); ++i) {
+    WebApplicationCacheHostImpl* host = GetHost(*i);
+    if (host)
+      host->OnErrorEventRaised(message);
+  }
+}
+
 void AppCacheFrontendImpl::OnLogMessage(int host_id, LogLevel log_level,
                                         const std::string& message) {
   WebApplicationCacheHostImpl* host = GetHost(host_id);