Fix find in page dialog title.

Title should now be announced when CTRL+F is pressed as well as when the
user presses ACCESSIBILITY_KEY+T.

Bug: 869703
Change-Id: If94076cfb7a09aac1965950fcb43e3cde649872b
Reviewed-on: https://chromium-review.googlesource.com/c/1376722
Commit-Queue: Dana Fried <dfried@chromium.org>
Reviewed-by: Cait Phillips <caitkp@chromium.org>
Reviewed-by: Bret Sepulveda <bsep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616891}
5 files changed