GitLab

Native Client.  This removes the special sandbox commands as well
as all special code.

This CL replaces http://codereview.chromium.org/2881016/show which
was rolled back because of problems on Mac OS X 10.5.  Those problems
were addressed in Native Client and pulled into Chrome with a DEPS
file update in http://codereview.chromium.org/2881034/show which was
committed as Chrome revision 53711.

BUG=http://code.google.com/p/nativeclient/issues/detail?id=344
TEST=all tests pass, including nacl_ui_tests

Review URL: http://codereview.chromium.org/3077003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@53936 0039d316-1c4b-4281-b951-d872f2087c98