Remove unused variable in tab_loader.cc

Change-Id: I6a807e5d88d1c1146e33eea096886bd73474f4d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1658288
Auto-Submit: Patrick Monette <pmonette@chromium.org>
Reviewed-by: Chris Hamilton <chrisha@chromium.org>
Commit-Queue: Chris Hamilton <chrisha@chromium.org>
Cr-Commit-Position: refs/heads/master@{#669791}
1 file changed