GitLab

We create a new NaClSandbox class, with InitializeLayerOneSandbox() and
InitializeLayerTwoSandbox() methods.

This class centralizes existing code and adds important security checks as
to whether or not threads are running or directory file descriptors are open.

BUG=359230, 358719
R=mseaborn@chromium.org

Review URL: https://codereview.chromium.org/250773003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@266735 0039d316-1c4b-4281-b951-d872f2087c98