GitLab

Mac creates a mini-framework in `ui_unittests Framework` so that ui
tests can get a resource bundle without depending on the Chrome
framework.

The way it generated locale information was causing build flakes since
two instances of repack_locales.py could be writing to
out/../gen/repack. Tests always use en-US, so instead just do what iOS
does and copy ui_test.pak to en.lproj/locale.pak and roll it into the
mini-framework bundle.

BUG=410468

Review URL: https://codereview.chromium.org/552963002

Cr-Commit-Position: refs/heads/master@{#294052}