Use std::tie() for operator< in ui/

Simplify the code for operator< when comparing multiple members using
a common std::tie idiom.

BUG=555171
R=danakj@chromium.org,benwells@chromium.org

Review URL: https://codereview.chromium.org/1464603003

Cr-Commit-Position: refs/heads/master@{#360706}


CrOS-Libchrome-Original-Commit: 7faa086b0179eea33c7cb9ded9964dc560ca42bd
2 files changed
tree: 629438827d67c6167f7faacbf2a5fa2bcde82d3b
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/