GitLab

The following stories are added:
tab_search:close_and_open:2020
tab_search:top10:loading:2020
tab_search:top50:loading:2020
tab_search:top100:loading:2020
Also increase buffer size and remove delay when adding tabs

Bug: 1099917
Change-Id: I08268ff34760775142acdc38d48aa3603f1d4b70
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2533236Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: Yuheng Huang <yuhengh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827105}