Add @RetryOnFailure on flaky CopylessPasteTest

This allows more investigation without making bots red.

Bug: 713172
Change-Id: I27e9b49ae816fa743e18ebb6c34931ac733d472a
Reviewed-on: https://chromium-review.googlesource.com/583715
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Commit-Queue: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#489117}
1 file changed