Add net-log entries when HttpStream jobs are forced to wait, and when they're delayed and resumed.

Add net-log entries when HttpStream jobs are forced to wait, and when they're delayed and resumed.

BUG=691688
Review-Url: https://codereview.chromium.org/2699433003
Cr-Commit-Position: refs/heads/master@{#450608}
(cherry picked from commit d27cf4ed111ab7f3bdab607fe48e4446d6cf15ca)

Review-Url: https://codereview.chromium.org/2699833007 .
Cr-Commit-Position: refs/branch-heads/2987@{#579}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/e5aaefbb2c1f86245d1130c7c645d193555f49f8

[Zhongyi Shi, 2017-02-17 20:51:56]

Description was changed from

==========
Add net-log entries when HttpStream jobs are forced to wait, and when they're
delayed and resumed.

BUG=691688

Review-Url: https://codereview.chromium.org/2699433003
Cr-Commit-Position: refs/heads/master@{#450608}
(cherry picked from commit d27cf4ed111ab7f3bdab607fe48e4446d6cf15ca)
==========

to

==========
Add net-log entries when HttpStream jobs are forced to wait, and when they're
delayed and resumed.

BUG=691688

Review-Url: https://codereview.chromium.org/2699433003
Cr-Commit-Position: refs/heads/master@{#450608}
(cherry picked from commit d27cf4ed111ab7f3bdab607fe48e4446d6cf15ca)

Review-Url: https://codereview.chromium.org/2699833007 .
Cr-Commit-Position: refs/branch-heads/2987@{#579}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/e5aaefbb2c1f86245d1130c7c645...
==========

[Zhongyi Shi, 2017-02-17 20:51:57]

Committed patchset #1 (id:1) manually as
e5aaefbb2c1f86245d1130c7c645d193555f49f8 (presubmit successful).

[Zhongyi Shi, 2017-02-17 21:44:34]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/2701053002/ by zhongyi@chromium.org.

The reason for reverting is: Revert this issue as it blocks the Beta build(
dependent on
https://chromium.googlesource.com/chromium/src/+/9255195315efa671012f0bd0da1a...).
Will fix the cl and re-merge..