QUIC - cronet - added idle_connection_timeout_seconds  experiment
that could be enabled via finch trials.

- idle_connection_timeout_seconds
  Specifes QUIC idle connection state lifetime. Default value is 30secs.

[email protected], [email protected]

Review URL: https://codereview.chromium.org/1505983003

Cr-Commit-Position: refs/heads/master@{#364545}
5 files changed