Is this blocking / a dupe of  issue 764505  ?

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/417adfb818795738bf5b32afea457b4ffe6495e3

commit 417adfb818795738bf5b32afea457b4ffe6495e3
Author: Andrey Kosyakov <caseq@chromium.org>
Date: Thu Nov 16 06:35:58 2017

DevTools: untangle request interceptor from network handler, make it reusable

This removes the dependency of DevToolsURLRequestInterceptor from NetworkHandler
(aside from couple of static methods) and replaces the instance of NetworkHandler
with a single callback. This also fixes crbug.com.777516 (managing active
interception job by target id), which would be a problem for multi-client mode.

Bug: 758136,  777516 
Change-Id: Ic065cb5c9683069ff115bbf06409f1e5cc7afcf4
Reviewed-on: https://chromium-review.googlesource.com/752502
Commit-Queue: Andrey Kosyakov <caseq@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#517002}
[modify] https://crrev.com/417adfb818795738bf5b32afea457b4ffe6495e3/content/browser/devtools/devtools_interceptor_controller.cc
[modify] https://crrev.com/417adfb818795738bf5b32afea457b4ffe6495e3/content/browser/devtools/devtools_interceptor_controller.h
[modify] https://crrev.com/417adfb818795738bf5b32afea457b4ffe6495e3/content/browser/devtools/devtools_url_interceptor_request_job.cc
[modify] https://crrev.com/417adfb818795738bf5b32afea457b4ffe6495e3/content/browser/devtools/devtools_url_interceptor_request_job.h
[modify] https://crrev.com/417adfb818795738bf5b32afea457b4ffe6495e3/content/browser/devtools/devtools_url_request_interceptor.cc
[modify] https://crrev.com/417adfb818795738bf5b32afea457b4ffe6495e3/content/browser/devtools/devtools_url_request_interceptor.h
[modify] https://crrev.com/417adfb818795738bf5b32afea457b4ffe6495e3/content/browser/devtools/protocol/network_handler.cc
[modify] https://crrev.com/417adfb818795738bf5b32afea457b4ffe6495e3/content/browser/devtools/protocol/network_handler.h