Check that all shared workers are terminated.

content/browser/shared_worker/shared_worker_service_impl.cc

Index: content/browser/shared_worker/shared_worker_service_impl.cc
diff --git a/content/browser/shared_worker/shared_worker_service_impl.cc b/content/browser/shared_worker/shared_worker_service_impl.cc
index 64bbe0b21943984a66b9e9c87ad08d7eeda38f49..cdb4ca4901fcce725d0d6582ffb24c4de9fe5c8c 100644
--- a/content/browser/shared_worker/shared_worker_service_impl.cc
+++ b/content/browser/shared_worker/shared_worker_service_impl.cc
@@ -446,6 +446,15 @@ void SharedWorkerServiceImpl::NotifyWorkerDestroyed(int worker_process_id,
                     WorkerDestroyed(worker_process_id, worker_route_id));
 }
 
+// TODO(alokp): Remove after collecting crash data.
+// Temporary checks to verify that all shared workers are terminated.
+// It is suspected that shared workers prevent render process hosts
+// from shutting down: crbug.com/608049
+void SharedWorkerServiceImpl::CheckAllWorkersTerminated() {
+  std::set<int> dependent_renderers = GetRenderersWithWorkerDependency();
+  CHECK_EQ(0u, dependent_renderers.size());
+}
+
 blink::WebWorkerCreationError
 SharedWorkerServiceImpl::ReserveRenderProcessToCreateWorker(
     std::unique_ptr<SharedWorkerPendingInstance> pending_instance) {