Added project members (weblayer-chrome@) and removed rockot@ from

weblayer/OWNERS

Bug: n/a
Change-Id: I46cdc1bb985281a775f0dc01b95366594e3e7b45
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1873727Reviewed-by: Darin Fisher <darin@chromium.org>
Commit-Queue: Christian O. Andersson <cricke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712104}

weblayer/OWNERS

+alexclarke@chromium.org
+blundell@chromium.org
 boliu@chromium.org
 cduvall@chromium.org
 darin@chromium.org
+estade@chromium.org
 jam@chromium.org
-rockot@chromium.org
+pshmakov@chromium.org
 sky@chromium.org
+timvolodine@chromium.org
+tobiasjs@chromium.org
 torne@chromium.org
 
 # TEAM: weblayer-dev@chromium.org