Portals: Test that adoptPredecessor can't be called after PortalActivateEvent.

Bug: 942286
Change-Id: I5e8b509da8e1df9ccaf1a3bb468177d17e4ab588
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1577937
Commit-Queue: Lucas Gadani <lfg@chromium.org>
Reviewed-by: Jeremy Roman <jbroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#653323}

third_party/blink/web_tests/external/wpt/lint.whitelist

@@ -185,6 +185,7 @@ SET TIMEOUT: offscreen-canvas/the-offscreen-canvas/*
 SET TIMEOUT: old-tests/submission/Microsoft/history/history_000.htm
 SET TIMEOUT: paint-timing/resources/subframe-painting.html
 SET TIMEOUT: payment-request/allowpaymentrequest/setting-allowpaymentrequest-timing.https.sub.html
+SET TIMEOUT: portals/resources/portals-adopt-predecessor-portal.html
 SET TIMEOUT: preload/single-download-preload.html
 SET TIMEOUT: resize-observer/resources/iframe.html
 SET TIMEOUT: resource-timing/resources/nested-contexts.js

third_party/blink/web_tests/external/wpt/portals/portals-adopt-predecessor.html

@@ -22,4 +22,14 @@
     });
     window.open(`resources/portals-adopt-predecessor.html?test=${test}`);
   }, "Tests that trying to adopt the predecessor twice will throw an exception.");
+
+  async_test(function(t) {
+    var test = "adopt-after-event";
+    var bc = new BroadcastChannel(`test-${test}`);
+    bc.onmessage = t.step_func_done(function(e) {
+      assert_equals(e.data, "passed");
+      bc.close();
+    });
+    window.open(`resources/portals-adopt-predecessor.html?test=${test}`);
+  }, "Tests that trying to adopt the predecessor after the PortalActivateEvent will throw an exception.");
 </script>

third_party/blink/web_tests/external/wpt/portals/resources/portals-adopt-predecessor-portal.html

@@ -4,21 +4,41 @@
   var test = searchParams.get("test");
 
   window.onportalactivate = function(e) {
-    var portal = e.adoptPredecessor();
-    document.body.appendChild(portal);
-
     if (test == "adopt-once") {
+      var portal = e.adoptPredecessor();
+      document.body.appendChild(portal);
+
       if (portal instanceof HTMLPortalElement) {
         portal.postMessage("adopted", "*");
       }
     }
     if (test == "adopt-twice") {
+      var portal = e.adoptPredecessor();
+      document.body.appendChild(portal);
+
       try {
         e.adoptPredecessor();
       } catch(e) {
-        portal.postMessage("passed", "*");
+        if (e.name == "InvalidStateError") {
+          var bc_test = new BroadcastChannel(`test-${test}`);
+          bc_test.postMessage("passed");
+          bc_test.close();
+        }
       }
     }
+    if (test == "adopt-after-event") {
+      setTimeout(function() {
+        try {
+          e.adoptPredecessor();
+        } catch(e) {
+          if (e.name == "InvalidStateError") {
+            var bc_test = new BroadcastChannel(`test-${test}`);
+            bc_test.postMessage("passed");
+            bc_test.close();
+          }
+        }
+      });
+    }
   }
 
   var bc = new BroadcastChannel(`portal-${test}`);