This reverts commit 4d2b9018.

Reason for revert: https://chromium-review.googlesource.com/c/chromium/tools/build/+/1214622

Original change's description:
> [bot_update] Stop using repository properties
> 
> Stop using repository and patch_repository_url properties.
> Use self.m.buildbucket.build.input.gerrit_changes[0].{host, project}
> instead.
> 
> R=​ehmaldonado@chromium.org, tandrii@chromium.org
> 
> Recipe-Nontrivial-Roll: build
> Bug: 877161, 694348
> Change-Id: Ideb069c6c8f8b6e6cfb5217f8a04ea18f16d3056
> Reviewed-on: https://chromium-review.googlesource.com/1208368
> Commit-Queue: Nodir Turakulov <nodir@chromium.org>
> Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>

TBR=nodir@chromium.org,tandrii@chromium.org,ehmaldonado@chromium.org

Change-Id: I825242124382e9f1789d4a3da0a3bdd2a5fcab37
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 877161, 694348
Reviewed-on: https://chromium-review.googlesource.com/1214703Reviewed-by: Nodir Turakulov <nodir@chromium.org>
Commit-Queue: Nodir Turakulov <nodir@chromium.org>