GitLab

It also hooks up libpdf which chrome requires at startup.

Adds the enable_hidpi and use_athena build flags.

Adds a locales list.

This makes the chrome target actually runnable from a GN build.

R=jamesr@chromium.org

Review URL: https://codereview.chromium.org/541153002

Cr-Commit-Position: refs/heads/master@{#293360}