Thanks yzshen@, I'll take a look.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8315b60debec6ad8ff65619310f4050705785d6b

commit 8315b60debec6ad8ff65619310f4050705785d6b
Author: Jun Cai <juncai@chromium.org>
Date: Wed Oct 25 19:24:34 2017

Fix Mojo Linux Perf FYI network service telemetry tests

Some of the network service telemetry tests currently timeout. This is due to
the change of the flag that is given to Chrome. The flag that was used before
was:
'--ignore-certificate-errors'
And now we are using:
'--ignore-certificate-errors-spki-list='
The current network service code doesn't handle this flag and causes the Chrome
browser to wait until timeout during the test.

To fix it, an IgnoreErrorsCertVerifier can be set when creating
URLRequestContextBuilder for the network service. Currently the
IgnoreErrorsCertVerifier is in //content/public/browser which prevents
//content/network code from using it. This CL moves it to
//content/public/network since it is related to that.

Bug:  770359 
Change-Id: I9e2c1d601e4a771e512bdb2578553555584c894b
Reviewed-on: https://chromium-review.googlesource.com/710513
Reviewed-by: Matt Menke <mmenke@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Reviewed-by: Yuzhu Shen <yzshen@chromium.org>
Commit-Queue: Jun Cai <juncai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#511549}
[modify] https://crrev.com/8315b60debec6ad8ff65619310f4050705785d6b/chrome/browser/io_thread.cc
[modify] https://crrev.com/8315b60debec6ad8ff65619310f4050705785d6b/chrome/browser/profiles/profile_io_data.cc
[modify] https://crrev.com/8315b60debec6ad8ff65619310f4050705785d6b/content/browser/BUILD.gn
[modify] https://crrev.com/8315b60debec6ad8ff65619310f4050705785d6b/content/browser/utility_process_host_impl.cc
[modify] https://crrev.com/8315b60debec6ad8ff65619310f4050705785d6b/content/network/network_context.cc
[modify] https://crrev.com/8315b60debec6ad8ff65619310f4050705785d6b/content/public/browser/BUILD.gn
[modify] https://crrev.com/8315b60debec6ad8ff65619310f4050705785d6b/content/public/network/BUILD.gn
[rename] https://crrev.com/8315b60debec6ad8ff65619310f4050705785d6b/content/public/network/ignore_errors_cert_verifier.cc
[rename] https://crrev.com/8315b60debec6ad8ff65619310f4050705785d6b/content/public/network/ignore_errors_cert_verifier.h
[rename] https://crrev.com/8315b60debec6ad8ff65619310f4050705785d6b/content/public/network/ignore_errors_cert_verifier_unittest.cc
[modify] https://crrev.com/8315b60debec6ad8ff65619310f4050705785d6b/content/shell/BUILD.gn
[modify] https://crrev.com/8315b60debec6ad8ff65619310f4050705785d6b/content/shell/browser/layout_test/layout_test_url_request_context_getter.cc
[modify] https://crrev.com/8315b60debec6ad8ff65619310f4050705785d6b/content/test/BUILD.gn

Update: the bot that runs the telemetry loading.desktop.network_service test:
https://build.chromium.org/p/chromium.perf.fyi/builders/Mojo%20Linux%20Perf
turns to "success".

Apologies, applied the wrong component in bulk.