GitLab

render_process_id is a much more common name for this process identifier
variable.

Refactoring change only. No functional changes intended.

Change-Id: Iefe4ce12ab1583031a031d1789ceafff4204b9d4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2413018
Commit-Queue: Darwin Huang <huangdarwin@chromium.org>
Auto-Submit: Darwin Huang <huangdarwin@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#807594}