[Merge M77] [NTP] Fix 'Done' button tabindex for richer picker

(cherry picked from commit 633b6fa29a73568e6f4501c3ec392f45f11f6e42)

Bug: 990789
Change-Id: I6d489a1f01397cdc611911dc9c5000a244648c05
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1737036
Commit-Queue: Kristi Park <[email protected]>
Commit-Queue: Gayane Petrosyan <[email protected]>
Auto-Submit: Kristi Park <[email protected]>
Reviewed-by: Gayane Petrosyan <[email protected]>
Cr-Original-Commit-Position: refs/heads/master@{#684093}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1740728
Reviewed-by: Kristi Park <[email protected]>
Cr-Commit-Position: refs/branch-heads/3865@{#252}
Cr-Branched-From: 0cdcc6158160790658d1f033d3db873603250124-refs/heads/master@{#681094}
diff --git a/chrome/browser/resources/local_ntp/customize.js b/chrome/browser/resources/local_ntp/customize.js
index a6bc9fc..42be576 100644
--- a/chrome/browser/resources/local_ntp/customize.js
+++ b/chrome/browser/resources/local_ntp/customize.js
@@ -868,7 +868,7 @@
 customize.richerPicker_maybeToggleDone = function() {
   const enable = customize.richerPicker_isOptionSelected();
   $(customize.IDS.MENU_DONE).disabled = !enable;
-  $(customize.IDS.MENU_DONE).tabIndex = enable ? 1 : 0;
+  $(customize.IDS.MENU_DONE).tabIndex = enable ? 0 : -1;
 };
 
 /**