GitLab

Index can be out of bounds when attaching to a new tabstrip.

Bug: 915956
Change-Id: Id921c4232f7e081b7d821f6722ff2ba7994ade76
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1670125
Commit-Queue: Charlene Yan <cyan@chromium.org>
Reviewed-by: Bret Sepulveda <bsep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#671507}