Revert "Remove eugenebut from ios/web owners"

This reverts commit b399fb2c.

Reason for revert:

Findit (https://goo.gl/kROfz5) identified CL at revision 844516 as the
culprit for failures in the build cycles as shown on:
https://analysis.chromium.org/waterfall/culprit?key=ag9zfmZpbmRpdC1mb3ItbWVyRAsSDVdmU3VzcGVjdGVkQ0wiMWNocm9taXVtL2IzOTlmYjJjYjc2Zjg2YTc4YTYxYWI4ZGRiYWQ3M2ZhYWVhNGQyZmIM

Sample Failed Build: https://ci.chromium.org/b/8857758622958410288

Sample Failed Step: compile

Original change's description:
> Remove eugenebut from ios/web owners
> 
> Bug: None
> Change-Id: I5c8684a3f17f2f147bb04a41ab84ba503aa56ae0
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2633193
> Auto-Submit: Eugene But <eugenebut@chromium.org>
> Commit-Queue: Ali Juma <ajuma@chromium.org>
> Reviewed-by: Ali Juma <ajuma@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#844516}


Change-Id: I8039a97b105dce9af8b85d8c2402a0001c2aa1b0
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: None
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2635681
Cr-Commit-Position: refs/heads/master@{#844519}

ios/web/OWNERS

 ajuma@chromium.org
+eugenebut@chromium.org
 gambard@chromium.org

ios/web/browsing_data/OWNERS

+eugenebut@chromium.org
 gambard@chromium.org
 
 per-file system_cookie_store_util_unittest.mm=mrefaat@chromium.org

ios/web/download/OWNERS

+eugenebut@chromium.org
 sdefresne@chromium.org

ios/web/favicon/OWNERS

+eugenebut@chromium.org
 gambard@chromium.org

ios/web/navigation/OWNERS

 ajuma@chromium.org
+danyao@chromium.org
+eugenebut@chromium.org

ios/web/public/download/OWNERS

+eugenebut@chromium.org
 sdefresne@chromium.org

ios/web/public/test/OWNERS

+eugenebut@chromium.org

ios/web/public/webui/OWNERS

+eugenebut@chromium.org
 michaeldo@chromium.org

ios/web/session/OWNERS

+eugenebut@chromium.org

ios/web/web_state/ui/OWNERS

+danyao@chromium.org
+eugenebut@chromium.org