Enable HTTP/0.9 on non-standard ports by default

This is a temporary patch to enable HTTP/0.9 on non-standard ports by
default.  After merging it with Chrome 56, it will be reverted, in favor
of specifically adding detection of Shoutcast servers on HTTP ports
other than port 80.

BUG=669800

Review-Url: https://codereview.chromium.org/2651753002
Cr-Commit-Position: refs/heads/master@{#445743}
3 files changed