Remove unnecessary parameter from InProcessCommandBuffer::Initialize

We always pass nullptr for |share_group| so just get rid of it.

Change-Id: I3c59a027748c885df02538f582b1309338f2dc8d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1596842
Auto-Submit: Saman Sami <samans@chromium.org>
Commit-Queue: Antoine Labour <piman@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#656834}
6 files changed