Fix VideoProcessorIntegrationTest on iOS.

BUG=webrtc:6634

Review-Url: https://codereview.webrtc.org/3013463002
Cr-Original-Commit-Position: refs/heads/master@{#19730}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 8180fa66de5d747d226672b9aa483e7724472789
1 file changed