Import wpt@a7e9c2abcf65b78fcf1c246fec6681c74e1bc352

third_party/WebKit/LayoutTests/external/wpt/html/browsers/browsing-the-web/unloading-documents/beforeunload-canceling.html

Index: third_party/WebKit/LayoutTests/external/wpt/html/browsers/browsing-the-web/unloading-documents/beforeunload-canceling.html
diff --git a/third_party/WebKit/LayoutTests/external/wpt/html/browsers/browsing-the-web/unloading-documents/beforeunload-canceling.html b/third_party/WebKit/LayoutTests/external/wpt/html/browsers/browsing-the-web/unloading-documents/beforeunload-canceling.html
index f330bfdc8340d98c357f7be8e42f3fc568767460..b415ac2a39c19650087d132eb5aa7fa540071934 100644
--- a/third_party/WebKit/LayoutTests/external/wpt/html/browsers/browsing-the-web/unloading-documents/beforeunload-canceling.html
+++ b/third_party/WebKit/LayoutTests/external/wpt/html/browsers/browsing-the-web/unloading-documents/beforeunload-canceling.html
@@ -118,7 +118,10 @@ const testCases = [
   }
 ];
 
-for (const testCase of testCases) {
+var testCaseIndex = 0;
+function runNextTest() {
+  const testCase = testCases[testCaseIndex];
+
   const labelAboutReturnValue = testCase.setReturnValue === undefined ? "" :
     `; setting returnValue to ${testCase.setReturnValue}`;
 
@@ -126,10 +129,14 @@ for (const testCase of testCases) {
     const iframe = document.createElement("iframe");
     iframe.onload = t.step_func(() => {
       iframe.contentWindow.runTest(t, testCase);
+      if (++testCaseIndex < testCases.length)
+        runNextTest();
     });
 
     iframe.src = "beforeunload-canceling-1.html";
     document.body.appendChild(iframe);
   }, `Returning ${testCase.valueToReturn} with a real iframe unloading${labelAboutReturnValue}`);
 }
+
+runNextTest();
 </script>