Make popstate and hashchange events not bubble

Out of Chrome, Edge, Firefox and Safari, only Firefox sets bubbles to
true for these events. Since they are dispatched on the Window object,
that is not particularly meaningful, so match the 3/4 majority.

Tests: web-platform-tests/wpt#11355.

Author: foolip

source

@@ -83201,20 +83201,19 @@ interface <dfn>Location</dfn> { // but see also <a href="#the-location-interface
      <li><p>If <var>state changed</var> is true, then <span data-x="concept-event-fire">fire an
      event</span> named <code data-x="event-popstate">popstate</code> at the <code>Document</code>
      object's <code>Window</code> object, using <code>PopStateEvent</code>, with the <code
-     data-x="dom-Event-bubbles">bubbles</code> attribute initialized to true and the <code
-     data-x="dom-PopStateEvent-state">state</code> attribute initialized <var>state</var>.</p></li>
+     data-x="dom-PopStateEvent-state">state</code> attribute initialized to
+     <var>state</var>.</p></li>
 
      <li><p>If <var>entry</var> is <span>an entry with persisted user state</span>, then the user
      agent may <span>restore persisted user state</span> and update aspects of the document and its
      rendering.</p></li>
 
      <li><p>If <var>hash changed</var> is true, then <span data-x="concept-event-fire">fire an
      event</span> named <code data-x="event-hashchange">hashchange</code> at the <span>browsing
-     context</span>'s <code>Window</code> object, using <code>HashChangeEvent</code>, with the <code
-     data-x="dom-Event-bubbles">bubbles</code> attribute initialized to true, the <code
-     data-x="dom-HashChangeEvent-oldURL">oldURL</code> attribute initialized to <var>old URL</var>,
-     and the <code data-x="dom-HashChangeEvent-newURL">newURL</code> attribute initialized to
-     <var>new URL</var>.</p></li>
+     context</span>'s <code>Window</code> object, using <code>HashChangeEvent</code>, with the
+     <code data-x="dom-HashChangeEvent-oldURL">oldURL</code> attribute initialized to <var>old
+     URL</var> and the <code data-x="dom-HashChangeEvent-newURL">newURL</code> attribute
+     initialized to <var>new URL</var>.</p></li>
 
     </ol>