Re-enable HTTP/2 over NPN (for OpenSSL).

BUG=557197

Committed: https://crrev.com/0eb771aa98ba2bd4db0e2b82241afe8f5760c32e
Cr-Commit-Position: refs/heads/master@{#361053}

Review URL: https://codereview.chromium.org/1453903002

Cr-Commit-Position: refs/heads/master@{#361330}
5 files changed