Mac: Disable AVSampleBufferDisplayLayer on Mac <10.11

There are reports of this leaking IOSurfaces.

BUG=631485

Review URL: https://codereview.chromium.org/2269473002 .

Cr-Commit-Position: refs/branch-heads/2785@{#698}
Cr-Branched-From: 68623971be0cfc492a2cb0427d7f478e7b214c24-refs/heads/master@{#403382}
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