Manually updating trunk VERSION from 3380.0 to 3381.0

The weekend canary branching failed, so it needs to be manually brought back in
sync for another run.

R=govind@google.com

Bug: 825555
Change-Id: Ifedb6c4a72bd58e3da9d855375a7563df343b52d
Reviewed-on: https://chromium-review.googlesource.com/981113Reviewed-by: Krishna Govind <govind@chromium.org>
Cr-Commit-Position: refs/heads/master@{#545835}

chrome/VERSION

 MAJOR=67
 MINOR=0
-BUILD=3380
+BUILD=3381
 PATCH=0