Revert 258831 "Revert 258727 "Implement ServiceWorker::postMessage()""

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 724b243f32293412126d22b2b21c4565119d6586..5be0fbbc771af7de1a92d3772948e5804d830b77 100644
--- a/content/browser/service_worker/service_worker_storage.cc
+++ b/content/browser/service_worker/service_worker_storage.cc
@@ -97,6 +97,24 @@ void ServiceWorkerStorage::GetAllRegistrations(
       BrowserThread::IO, FROM_HERE, base::Bind(callback, registrations));
 }
 
+void ServiceWorkerStorage::FindRegistrationForId(
+    int64 registration_id,
+    const FindRegistrationCallback& callback) {
+  ServiceWorkerStatusCode status = SERVICE_WORKER_ERROR_NOT_FOUND;
+  scoped_refptr<ServiceWorkerRegistration> found;
+  for (PatternToRegistrationMap::const_iterator it =
+           registration_by_pattern_.begin();
+       it != registration_by_pattern_.end();
+       ++it) {
+    if (registration_id == it->second->id()) {
+      status = SERVICE_WORKER_OK;
+      found = it->second;
+      break;
+    }
+  }
+  RunSoon(base::Bind(callback, status, found));
+}
+
 void ServiceWorkerStorage::StoreRegistration(
     ServiceWorkerRegistration* registration,
     const StatusCallback& callback) {