GitLab

Do not create new LazyContextIds when existing ones can be used.

Bug: None
Test: No visible side-effect expected.
Change-Id: Id8837392f74e07efa1efa200fd87789cddc866e3
Reviewed-on: https://chromium-review.googlesource.com/c/1487204
Commit-Queue: Istiaque Ahmed <lazyboy@chromium.org>
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#635896}