Relax check for message loop in SequencedWorkerPool

Assert that the constructor message loop is non-NULL only when
the SequencedWorkerPool is about to be destroyed.

Revert now-unneccessary test changes that adds MessagePools for
SequenedWorkerPool.

BUG=117940
TEST=


Review URL: http://codereview.chromium.org/9699115

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@127335 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: caaf3ccabb7c80184ad37c92db43ff79580e067d
2 files changed
tree: 600bbf3a4f28268164d66176cff2d4ea1f484701
  1. base/
  2. build/
  3. dbus/
  4. ipc/
  5. testing/
  6. third_party/