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Recently, fake-bidi was introduced into the list of supported locales:
  https://codereview.chromium.org/2773453003

This introduced a bug where fake-bidi appeared on our list of supported
locales, yet could not be selected as a locale. Since we are missing
dedeicated resources for fake-bidi, and not of our tests explicitly
support it, remove support everywhere for consistency. Also unify the
locale list into a single place that can be referenced from anywhere in
GN.

BUG= internal b/37215118
Test: All .pak files generate properly, setup test works.

Change-Id: I8bc7e7335716d14288654d9912479d31f6438555
Reviewed-on: https://chromium-review.googlesource.com/488166Reviewed-by: Luke Halliwell <halliwell@chromium.org>
Commit-Queue: Stephen Lanham <slan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#468011}