a11y/options: Fix initial tab focus bug on supervised user history page.

R=dmazzoni@chromium.org
BUG=393489

Review URL: https://codereview.chromium.org/395023002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283666 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/history/history.js

@@ -1703,7 +1703,7 @@ HistoryView.prototype.updateFocusableElements_ = function() {
       this.currentVisits_.length > 0) {
     var firstVisit = this.currentVisits_[0];
     firstVisit.setIsLead(true);
-    if (firstVisit.checkBox) firstVisit.checkBox.tabIndex = 0;
+    (firstVisit.checkBox || firstVisit.titleLink).tabIndex = 0;
   }
 };
 

chrome/test/data/webui/history_browsertest.js

@@ -777,6 +777,11 @@ TEST_F('HistoryWebUIRealBackendTest', 'basic', function() {
   testDone();
 });
 
+TEST_F('HistoryWebUIRealBackendTest', 'atLeastOneFocusable', function() {
+  assertEquals(1, document.querySelectorAll('[tabindex="0"]').length);
+  testDone();
+});
+
 /**
  * Test individual deletion of history entries.
  */
@@ -862,6 +867,11 @@ TEST_F('HistoryWebUIDeleteProhibitedTest', 'deleteProhibited', function() {
   waitForCallback('deleteFailed', testDone);
 });
 
+TEST_F('HistoryWebUIDeleteProhibitedTest', 'atLeastOneFocusable', function() {
+  assertEquals(1, document.querySelectorAll('[tabindex="0"]').length);
+  testDone();
+});
+
 /**
  * Fixture for History WebUI testing IDN.
  * @extends {BaseHistoryWebUITest}