Use constexpr TaskTraits constructor in base.

Use a constexpr constructor that accepts traits in any order instead of
the builder pattern to construct TaskTraits in base.

BUG=713683
R=gab@chromium.org

Review-Url: https://codereview.chromium.org/2861833002
Cr-Commit-Position: refs/heads/master@{#469167}


CrOS-Libchrome-Original-Commit: 2524b542c3053e57d0c70593d26c86ef4785f881
2 files changed
tree: c8325a1a13eab8667e6313aba47e51fde165839a
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/