Change flat_tree::unsafe_emplace to actually emplace

This change modifies base::flat_tree::unsafe_emplace to do an emplace instead of an insert under the hood.

BUG=671759

Review-Url: https://codereview.chromium.org/2792343002
Cr-Commit-Position: refs/heads/master@{#461863}


CrOS-Libchrome-Original-Commit: f7d92cff18cba731d3a33d19d3f9595bbacd6fb6
1 file changed
tree: bc6d2949cf29a5c84f424ea6da3e34ad6da31595
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/