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

LayoutTests/http/tests/history/resources/back-with-fragment-change-target.html

 <script>
 onload = function() {
     setTimeout(function() {
         // Start to go back (runs asynchonously)
         history.back();
         // But immediately cancel that load of a history item and navigate to
         // a fragment on the page instead. We should remain on this page and
         // a history item should be added (with past ones not being affected)
         setTimeout(function(){window.location = '#foo'}, 0);
     }, 0);
 }
   
 onhashchange = function() {
     setTimeout(done, 100);
 }
 
 function done() {
     delete sessionStorage.didNavigate;
     console.log('Visited fragment and waited.');
     if (window.layoutTestController) {
         layoutTestController.notifyDone();
     }
 }
 </script>
 PASS