Update installed ServiceWorkers.

content/browser/service_worker/service_worker_storage.cc

Index: content/browser/service_worker/service_worker_storage.cc
diff --git a/content/browser/service_worker/service_worker_storage.cc b/content/browser/service_worker/service_worker_storage.cc
index bc5a82aef2e091fa80aaafa7a67264334eb64ad2..7caca63938e5a0e39251d97442d6efd4eb0e1d8f 100644
--- a/content/browser/service_worker/service_worker_storage.cc
+++ b/content/browser/service_worker/service_worker_storage.cc
@@ -392,6 +392,13 @@ void ServiceWorkerStorage::DoomUncommittedResponse(int64 id) {
   StartPurgingResources(std::vector<int64>(1, id));
 }
 
+void ServiceWorkerStorage::CompareScriptResources(
+    int64 lhs_id, int64 rhs_id,
+    const CompareCallback& callback) {
+  // TODO: claim equality for the moment
+  RunSoon(FROM_HERE, base::Bind(callback, SERVICE_WORKER_OK, 0));
+}
+
 void ServiceWorkerStorage::DeleteAndStartOver(const StatusCallback& callback) {
   Disable();