Convert //base to use std::unique_ptr

With bonus IWYU fixes that weren't caught by local android gn, cros gn,
linux gn, mac gyp, and win gyp builds.

BUG=554298
TBR=brettw@chromium.org

Review URL: https://codereview.chromium.org/1852433005

Cr-Original-Commit-Position: refs/heads/master@{#385011}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 093de9b30c0ba6ded896506a297314e5ed818b89
1 file changed
tree: a6744171744aad3aef6a5314a5af4422ed6802bc
  1. trace_event_common.h