Use QUIC_VERSION_27
Use QUIC_VERSION_27

Committed: https://crrev.com/1919e2df80dad7dd76bf28c7b05a53d1acd9ae05
Cr-Commit-Position: refs/heads/master@{#354451}

Review URL: https://codereview.chromium.org/1394283005

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#355229}

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