Make Chromium DEPS autoroller set Bot-Commit+1

Bug: chromium:1260482
Change-Id: I2bc1a2ccab3d07588d3d965f3c24e60ae0dba41b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/238140
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Christoffer Jansson <jansson@google.com>
Auto-Submit: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Christoffer Jansson <jansson@google.com>
Cr-Commit-Position: refs/heads/main@{#35362}
diff --git a/tools_webrtc/autoroller/roll_deps.py b/tools_webrtc/autoroller/roll_deps.py
index 02a17c5..1d07ed7 100755
--- a/tools_webrtc/autoroller/roll_deps.py
+++ b/tools_webrtc/autoroller/roll_deps.py
@@ -645,8 +645,11 @@
     cmd = ['git', 'cl', 'upload', '--force', '--bypass-hooks']
     if commit_queue_mode >= 2:
         logging.info('Sending the CL to the CQ...')
+        # Sets Commit-Queue+2.
         cmd.extend(['--use-commit-queue'])
         cmd.extend(['--send-mail', '--cc', NOTIFY_EMAIL])
+        # Sets Bot-Commit+1.
+        cmd.extend(['-o', 'label=Bot-Commit+1'])
     elif commit_queue_mode >= 1:
         logging.info('Starting CQ dry run...')
         cmd.extend(['--cq-dry-run'])