Remove unused include of wtf/atomics.h in idb_database.cc.

Change-Id: Ic5f75f1cabac1adecbf0158d3a508eaec876da02
Reviewed-on: https://chromium-review.googlesource.com/c/1348856
Commit-Queue: Victor Costan <pwnall@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#610495}
1 file changed