GitLab

Have ExtensionsBrowserClient provide the application locale instead of
using g_browser_process.

Bug: 446329
Change-Id: Ibbab77cf385b2d11c1e6ee093c9118d652324635
Reviewed-on: https://chromium-review.googlesource.com/587420
Commit-Queue: Michael Giuffrida <michaelpg@chromium.org>
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491335}