Fix an apparent typo in a unittest that caused it to not actually check the new window list it fetched.

This would only have an effect when window capture failed, and apparently that was never happening.

BUG=none
R=sergeyu@chromium.org

Review URL: https://webrtc-codereview.appspot.com/52009004

Cr-Commit-Position: refs/heads/master@{#9348}
1 file changed