Deflake CopyBetweenWindows/FilesAppBrowserTest tests.

Bug: 911609
Change-Id: I69434c3516bc8867eb0a67e2c6df4699887d8ff2
Reviewed-on: https://chromium-review.googlesource.com/c/1364970
Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Sam McNally <sammc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#614275}
2 files changed