Fix a resource leak in insecure-websocket-in-secure-page-worker.html

third_party/WebKit/LayoutTests/http/tests/security/mixedContent/websocket/insecure-websocket-in-secure-page-worker.html

Index: third_party/WebKit/LayoutTests/http/tests/security/mixedContent/websocket/insecure-websocket-in-secure-page-worker.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/security/mixedContent/websocket/insecure-websocket-in-secure-page-worker.html b/third_party/WebKit/LayoutTests/http/tests/security/mixedContent/websocket/insecure-websocket-in-secure-page-worker.html
index 471d46219f1f6626fd222ed2453d3b851e6d047e..657a54332e3acb89a1d082f07a4f3bfbc6c46c30 100644
--- a/third_party/WebKit/LayoutTests/http/tests/security/mixedContent/websocket/insecure-websocket-in-secure-page-worker.html
+++ b/third_party/WebKit/LayoutTests/http/tests/security/mixedContent/websocket/insecure-websocket-in-secure-page-worker.html
@@ -14,13 +14,15 @@ if (window.testRunner) {
 var test = async_test("Test that an insecure WebSocket connection is blocked when created in a worker created from HTTPS resource.");
 test.step(function ()
 {
+    let openedWindow;
     window.addEventListener("message", test.step_func(function (evt)
     {
         assert_equals(evt.data, "DONE", "evt.data");
+        openedWindow.close();
         test.done();
     }), false);
 
-    window.open("https://127.0.0.1:8443/security/mixedContent/websocket/resources/expect-throw-on-construction-worker.html");
+    openedWindow = window.open("https://127.0.0.1:8443/security/mixedContent/websocket/resources/expect-throw-on-construction-worker.html");
 });
 
 </script>