Add a sequenced worker pool.

This allows tasks to be put in the worker pool with optional sequencing semantics for consumers that must run a bunch of stuff in order on a background thread, but don't particularly care about which thread.
Review URL: http://codereview.chromium.org/8416019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@116078 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: 098def22390dd628396e0d962235fc06e935282e
5 files changed
tree: 66ebc1a496e202f94630e32651e2a8da7e7692ee
  1. base/
  2. build/
  3. dbus/
  4. ipc/
  5. testing/
  6. third_party/