Remove overflow_menu_container tab index = -1.

This line was originally removed in
https://chromium-review.googlesource.com/c/chromium/src/+/1401842, but
due to a bad rebase, got added back in.

Bug: 920996
Change-Id: I54c81ca2b5da6bf21471561ddbceee61c0072b18
Reviewed-on: https://chromium-review.googlesource.com/c/1407964
Reviewed-by: Tommy Steimel <steimel@chromium.org>
Commit-Queue: CJ DiMeglio <lethalantidote@chromium.org>
Cr-Commit-Position: refs/heads/master@{#622299}
diff --git a/third_party/blink/renderer/modules/media_controls/elements/media_control_input_element.cc b/third_party/blink/renderer/modules/media_controls/elements/media_control_input_element.cc
index d40803c..441b1ae 100644
--- a/third_party/blink/renderer/modules/media_controls/elements/media_control_input_element.cc
+++ b/third_party/blink/renderer/modules/media_controls/elements/media_control_input_element.cc
@@ -75,8 +75,6 @@
   if (MediaControlsImpl::IsModern()) {
     overflow_menu_container_ = HTMLDivElement::Create(GetDocument());
     overflow_menu_container_->ParserAppendChild(overflow_menu_text_);
-    // Having the container selectable caused aria output to be duplicated.
-    overflow_menu_container_->setTabIndex(-1);
     UpdateOverflowSubtitleElement(button->GetOverflowMenuSubtitleString());
     element->ParserAppendChild(overflow_menu_container_);
   } else {