base: Make TaskQueue a typedef instead of a subclass

Subclassing STL types is bad. And std::queue::swap exists as of c++11.

R=vmpstr

Review-Url: https://codereview.chromium.org/2068833003
Cr-Commit-Position: refs/heads/master@{#400006}


CrOS-Libchrome-Original-Commit: 5d79215245df21c35b5ff63d6c46deca5d1498f4
3 files changed
tree: d58b56dd3b3c8c619b4a5eca44e74936af7ca508
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/