Revert of Re-enable HTTP/2 over NPN (for OpenSSL). (patchset #3 id:40001 of https://codereview.chromium.org/1453903002/ )

Reason for revert:
The CL has introduced massive MSan and Valgrind reports, see the bug.

BUG=557197

Original issue's description:
> Re-enable HTTP/2 over NPN (for OpenSSL).
>
> BUG=557197
>
> Committed: https://crrev.com/0eb771aa98ba2bd4db0e2b82241afe8f5760c32e
> Cr-Commit-Position: refs/heads/master@{#361053}

TBR=cbentzel@chromium.org,bnc@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=557197

Review URL: https://codereview.chromium.org/1472743002

Cr-Commit-Position: refs/heads/master@{#361088}
5 files changed