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Restore the alphabetical order in javascript.

Saves around 100k when gzip is used, but only 2k for brotli.
Intention is to have android_webview to use the same copy
of about:credits in a follow-up, in which case this optimization
becomes relevant.

BUG=688077

Change-Id: I24d62a81c61c2c53f5740f90d0c8094d3b04352e
Reviewed-on: https://chromium-review.googlesource.com/487725Reviewed-by: Richard Coles <torne@chromium.org>
Reviewed-by: Dan Beam <dbeam@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Yipeng Wang <yipengw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#467537}