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If we're not aggressive about expiring a retro frame (e.g. MISSED
frames) then it's possible to enter a high latency mode often.

PixelTestOutputSurface is used by the ui compositor in tests and we
should not subtract the default estimated parent draw time from the
deadline in that case. Doing so will cause MISSED frames to always
expire in tests.

BUG=469953

Review URL: https://codereview.chromium.org/1055113004

Cr-Commit-Position: refs/heads/master@{#330669}