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We can pouplate the following data on load time:
1. I18N strings
2. Chrome specific data
  * Such as board name, CrOS version, etc

Bug: 980846
Test: Check chrome://camera-app/strings.js
Change-Id: Ieb46d4007ca93ca4d9e7a23bcd8005da65617ef8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2245986
Commit-Queue: Wei Lee <wtlee@chromium.org>
Commit-Queue: Shik Chen <shik@chromium.org>
Auto-Submit: Wei Lee <wtlee@chromium.org>
Reviewed-by: Shik Chen <shik@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Brian White <bcwhite@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796786}