DOMSnapshot.getSnapshot to expose contentLanguage  

Bug: 546953
Change-Id: I9420cacac4054cf864fed9ebe9ac2f9b98224f9c
Reviewed-on: https://chromium-review.googlesource.com/558069
Commit-Queue: Alex Clarke <alexclarke@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Reviewed-by: Eric Seckler <eseckler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#483799}
4 files changed