GitLab

heap: Few trace traits cleanups

- Use struct for AdjustPointerTrait.
- Replace TraceIfEnabled with TraceIfNeeded
- Avoid nullptr checks where the next call would anyways crash on
  dispatch

Bug: 1019191
Change-Id: Ib28d3b6c125623bac9a0bbbeda87dfa37528aa48
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1893061
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712130}