Bug 1531039 - Fix a couple more tests in browser/base/content to work with QuantumBar. r=adw

Differential Revision: https://phabricator.services.mozilla.com/D21377

--HG--
extra : moz-landing-system : lando

browser/base/content/test/pageActions/browser_page_action_menu.js

@@ -848,7 +848,7 @@ add_task(async function contextMenu() {
   // urlbar tests that run after this one can break if the mouse is left over
   // the area where the urlbar popup appears, which seems to happen due to the
   // above synthesized mouse events.  Move it over the urlbar.
-  EventUtils.synthesizeMouseAtCenter(gURLBar, { type: "mousemove" });
+  EventUtils.synthesizeMouseAtCenter(gURLBar.textbox, { type: "mousemove" });
   gURLBar.focus();
 });
 

browser/base/content/test/sidebar/browser_sidebar_keys.js

@@ -2,7 +2,7 @@
  * http://creativecommons.org/publicdomain/zero/1.0/ */
 
 async function testSidebarKeyToggle(key, options, expectedSidebarId) {
-  EventUtils.synthesizeMouseAtCenter(gURLBar, {});
+  EventUtils.synthesizeMouseAtCenter(gURLBar.textbox, {});
   let promiseShown = BrowserTestUtils.waitForEvent(window, "SidebarShown");
   EventUtils.synthesizeKey(key, options);
   await promiseShown;