Revert r23911, which switched from fork to vfork().

Everything still worked correctly, but our performance bots didn't measure
any improvements.  Perhaps I just ended up measuring the dtrace overhead of
fork vs vfork.

BUG=19863

Review URL: http://codereview.chromium.org/174229


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@23969 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: e65723081b1f5e0a2fd1fddd411fe64806a9d7ef
1 file changed
tree: 152dd2e7b4bedf90d88c722dacc7d753405a1e79
  1. base/
  2. build/
  3. ipc/
  4. testing/