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The language that is currently used in loadtimedata has had the region
code stripped out. This means that we can't tell the difference between
en-GB and en-US, or zh-CN and zh-TW. That means they fall back to
english for our app.

Using application locale solves this.

Bug: b/157427039
Change-Id: Id83d420752aa9da0808652693194ecf6bc9b5702
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2215158Reviewed-by: dstockwell <dstockwell@chromium.org>
Commit-Queue: Rachel Carpenter <carpenterr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#772523}