PlzNavigate: stop navigations when opening a document for write

third_party/WebKit/LayoutTests/http/tests/misc/window-open-then-write.html

Index: third_party/WebKit/LayoutTests/http/tests/misc/window-open-then-write.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/misc/window-open-then-write.html b/third_party/WebKit/LayoutTests/http/tests/misc/window-open-then-write.html
index 9bee4205f19f1d185e42ef507cdb77d11729e57b..6473f973a550f1428d8fc50948bcd025eecf812e 100644
--- a/third_party/WebKit/LayoutTests/http/tests/misc/window-open-then-write.html
+++ b/third_party/WebKit/LayoutTests/http/tests/misc/window-open-then-write.html
@@ -8,7 +8,7 @@ if (window.testRunner) {
 
 function runTest() {
     var w = window.open('window-open-then-write.html');
-    w.document.write('<img src="resources/compass.jpg" onload="if (window.testRunner) setTimeout(\'testRunner.notifyDone()\', 100);">');
+    w.document.write('<img src="resources/compass.jpg" onload="if (window.testRunner) setTimeout(\'testRunner.notifyDone()\', 500);">');

[Nate Chapin, 2017/03/07 18:39:08]

What's the reason for extending this timeout? Is there any way we can avoid
extended it, or even better, get rid of it entirely?

[clamy, 2017/03/13 13:55:57]

Sorry this was for testing. I needed to trigger a race condition, and it worked
a lot better with a long timer. Will remove it in the next patchset.

     w.document.close();
 }
 </script>