Remove dependency from NaCl code on chrome_constants.

This is part of an effort to componentize NaCl code.
BUG=244791

Review URL: https://chromiumcodereview.appspot.com/16154005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@207806 0039d316-1c4b-4281-b951-d872f2087c98
6 files changed