Fix a bug in network_session_configurator.cc in which support for HTTPS URLS in QUIC proxies was always set to false.

BUG=914497

Change-Id: I56ad16088168302598bb448553ba32795eee3756
Reviewed-on: https://chromium-review.googlesource.com/c/1417356
Auto-Submit: Ryan Hamilton <rch@chromium.org>
Commit-Queue: Zhongyi Shi <zhongyi@chromium.org>
Reviewed-by: Zhongyi Shi <zhongyi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#623763}
  void ParseFieldTrials() {
    ParseCommandLineAndFieldTrials(
        base::CommandLine(base::CommandLine::NO_PROGRAM));
  }

  void ParseFieldTrials() {
    ParseCommandLineAndFieldTrials(
        base::CommandLine(base::CommandLine::NO_PROGRAM));
  }
