Update test expectation for media/video-display-aspect-ratio.html.
Update test expectation for media/video-display-aspect-ratio.html.

Allow failure until chromium change is landed and test is updated.

TBR=wolenetz@chromium.org
BUG=523073

Review URL: https://codereview.chromium.org/1293543007

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@200955 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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