GitLab

1. base64, rand_util, threading, time and threads were previosly disabled in
base_untrusted. Remoting code depends on these parts of base, so they
need to be enabled.
2. Implemented NaCl version of rand_util.
3. Enabled glibc version of base_untrusted

BUG=134216

Review URL: https://chromiumcodereview.appspot.com/10795083

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@148641 0039d316-1c4b-4281-b951-d872f2087c98