This flag doesn't work, isn't maintained, and accounts for a log of complexity in the build.
See:
https://groups.google.com/a/chromium.org/forum/#!topic/chromium-dev/UCOhZfHN1sc
We should remove the build flag and corresponding feature define. The code in components should be key-ed off of iOS (the only place where we don't want policy). This is only a small amount of the code since most of it is in src/chrome that isn't used on iOS any more.
Comment 1 by bugdroid1@chromium.org
, Mar 15 2016