Merge 95259 - Fragment navigations should interrupt a provisional load of a different document

LayoutTests/http/tests/navigation/navigation-interrupted-by-fragment.html

 <script>
 if (window.layoutTestController) {
     layoutTestController.dumpBackForwardList();
     layoutTestController.dumpAsText();
     layoutTestController.waitUntilDone();
 }
 onload = function() {
     window.location = 'resources/slow-resource.pl?delay=100';
     setTimeout(function() {window.location = 'navigation-interrupted-by-fragment.html#abc'}, 10);
 }
 
 onhashchange = function() {
     setTimeout(done, 100);
 }
 
 function done() {
     console.log('Visited fragment and waited.');
     if (window.layoutTestController) {
         layoutTestController.notifyDone();
     }
 }
 
 console.log('First visit.');
 
 </script>
 <p>This test checks that interrupting a slow navigation with a fragment navigation will cancel the first navigation.