Import w3c tests for the service workers

third_party/WebKit/LayoutTests/imported/wpt/service-workers/service-worker/resources/wait-forever-in-install-worker.js

Index: third_party/WebKit/LayoutTests/imported/wpt/service-workers/service-worker/resources/wait-forever-in-install-worker.js
diff --git a/third_party/WebKit/LayoutTests/imported/wpt/service-workers/service-worker/resources/wait-forever-in-install-worker.js b/third_party/WebKit/LayoutTests/imported/wpt/service-workers/service-worker/resources/wait-forever-in-install-worker.js
new file mode 100644
index 0000000000000000000000000000000000000000..af85a73ad3e11e60b9dc935e188aa0abb793d512
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/imported/wpt/service-workers/service-worker/resources/wait-forever-in-install-worker.js
@@ -0,0 +1,12 @@
+var waitUntilResolve;
+self.addEventListener('install', function(event) {
+    event.waitUntil(new Promise(function(resolve) {
+        waitUntilResolve = resolve;
+      }));
+  });
+
+self.addEventListener('message', function(event) {
+    if (event.data === 'STOP_WAITING') {
+      waitUntilResolve();
+    }
+  });