https://codereview.chromium.org/1932853002/

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d4c21ab215ec191359bd8bb3f85f1249e219845c

commit d4c21ab215ec191359bd8bb3f85f1249e219845c
Author: xunjieli <xunjieli@chromium.org>
Date: Thu Apr 28 22:44:47 2016

Log urls and headers in BIDIRECTIONAL_STREAM events

BIDIRECTIONAL_STREAM events do not have urls and headers in NetLog. This makes
debugging hard. Headers are currently logged in HTTP2_SESSION and QUIC_SESSION,
but the session events can have a bunch of requests going on, and it is hard to
associate headers with each bidirectional stream.

This CL logs urls and the headers sent and received in BIDIRECTIONAL_STREAM
events.

BUG= 607613 

Review-Url: https://codereview.chromium.org/1932853002
Cr-Commit-Position: refs/heads/master@{#390518}

[modify] https://crrev.com/d4c21ab215ec191359bd8bb3f85f1249e219845c/net/http/bidirectional_stream.cc
[modify] https://crrev.com/d4c21ab215ec191359bd8bb3f85f1249e219845c/net/http/bidirectional_stream_unittest.cc
[modify] https://crrev.com/d4c21ab215ec191359bd8bb3f85f1249e219845c/net/http/http_log_util.cc
[modify] https://crrev.com/d4c21ab215ec191359bd8bb3f85f1249e219845c/net/http/http_log_util.h
[modify] https://crrev.com/d4c21ab215ec191359bd8bb3f85f1249e219845c/net/log/net_log_event_type_list.h
[modify] https://crrev.com/d4c21ab215ec191359bd8bb3f85f1249e219845c/net/quic/quic_chromium_client_session.cc
[modify] https://crrev.com/d4c21ab215ec191359bd8bb3f85f1249e219845c/net/spdy/spdy_session.cc