Block ptrace (and ptrace-like) syscalls from the renderer and worker processs.

BUG=125225
Review URL: https://chromiumcodereview.appspot.com/10454110

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@140080 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed