GitLab

Ensure the reflection mask image is loaded before ending the test.

Will update TestExpectations later if the test will no longer be flaky.

Bug: 777259
Change-Id: I2ed912f650c80a12ac51308799173a54ffe35314
Reviewed-on: https://chromium-review.googlesource.com/744288
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#512872}