This is an implementation detail of ResourceDispatcherHostImpl, we shouldn't need to do these checks for network service.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ae10116cc36d6b44868ccd4ae50589ff77b127e2

commit ae10116cc36d6b44868ccd4ae50589ff77b127e2
Author: Clark DuVall <cduvall@chromium.org>
Date: Wed Aug 15 01:26:46 2018

Fix SecurityExploitBrowserTest to use network service path

These tests were accessing ResourceMessageFilter directly, instead of
using the network service path when it is enabled.

Bug:  862176 ,  874227 
Cq-Include-Trybots: luci.chromium.try:linux_mojo
Change-Id: I3add3b588ad40c3bca265ad68adccca293ddae0d
Reviewed-on: https://chromium-review.googlesource.com/1175105
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: Clark DuVall <cduvall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583117}
[modify] https://crrev.com/ae10116cc36d6b44868ccd4ae50589ff77b127e2/content/browser/renderer_host/render_process_host_impl.h
[modify] https://crrev.com/ae10116cc36d6b44868ccd4ae50589ff77b127e2/content/browser/security_exploit_browsertest.cc
[modify] https://crrev.com/ae10116cc36d6b44868ccd4ae50589ff77b127e2/testing/buildbot/filters/mojo.fyi.network_browser_tests.filter
[modify] https://crrev.com/ae10116cc36d6b44868ccd4ae50589ff77b127e2/testing/buildbot/filters/mojo.fyi.network_content_browsertests.filter