GitLab

Original change:
Initial Google tts engine settings page

- hooks up a message to retrieve display voice name and language (for *only* Google tts engine)
- adds the initial page UI (under UI review)
- adds string resources (under review)

Bug: 831286

TBR=dtseng@chromium.org,hcarmona@chromium.org,katie@chromium.org

Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I1bb2780758992ed9f8e240ed28a8176201d06f05
Reviewed-on: https://chromium-review.googlesource.com/1028766
Commit-Queue: David Tseng <dtseng@chromium.org>
Reviewed-by: David Tseng <dtseng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553811}