The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f8c844f4d515fb2fb90495304d4c443bf3ff73ad

commit f8c844f4d515fb2fb90495304d4c443bf3ff73ad
Author: Jian Li <jianli@chromium.org>
Date: Thu May 10 22:15:02 2018

Copy OfflinePageRequestJob files to OfflinePageRequestHandler

These new files are simply copies of OfflinePageRequestJob files
with name changes. They're not added to compile targets. This will
allow easier reviewing for next patch that refactor
OfflinePageRequestHandler to support both with network service
enabled and without network service enabled.

Bug:  841617 
Change-Id: I295479cfe2240eddd77a7f9580af4c0346997282
Reviewed-on: https://chromium-review.googlesource.com/1053364
Reviewed-by: Dmitry Titov <dimich@chromium.org>
Commit-Queue: Jian Li <jianli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557681}
[add] https://crrev.com/f8c844f4d515fb2fb90495304d4c443bf3ff73ad/chrome/browser/offline_pages/offline_page_request_handler.cc
[add] https://crrev.com/f8c844f4d515fb2fb90495304d4c443bf3ff73ad/chrome/browser/offline_pages/offline_page_request_handler.h
[add] https://crrev.com/f8c844f4d515fb2fb90495304d4c443bf3ff73ad/chrome/browser/offline_pages/offline_page_request_handler_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/18e2924dcbe2045d6ad24002fdce6e21b407f898

commit 18e2924dcbe2045d6ad24002fdce6e21b407f898
Author: Jian Li <jianli@chromium.org>
Date: Thu May 10 22:25:12 2018

Adds URLLoaderRequestInterceptor for network servicification

This allows the embedder to create a URLLoader and ntercept a
navigation request.

Bug:  841617 
Change-Id: Id6d8c795805413962151be5fbdce91e52322af5d
Reviewed-on: https://chromium-review.googlesource.com/1053352
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: Jian Li <jianli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557699}
[modify] https://crrev.com/18e2924dcbe2045d6ad24002fdce6e21b407f898/content/browser/loader/navigation_url_loader_impl.cc
[modify] https://crrev.com/18e2924dcbe2045d6ad24002fdce6e21b407f898/content/public/browser/BUILD.gn
[modify] https://crrev.com/18e2924dcbe2045d6ad24002fdce6e21b407f898/content/public/browser/content_browser_client.cc
[modify] https://crrev.com/18e2924dcbe2045d6ad24002fdce6e21b407f898/content/public/browser/content_browser_client.h
[add] https://crrev.com/18e2924dcbe2045d6ad24002fdce6e21b407f898/content/public/browser/url_loader_request_interceptor.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e4f685ee45e7061733041e81d90cd95bcfd5f8de

commit e4f685ee45e7061733041e81d90cd95bcfd5f8de
Author: Jian Li <jianli@chromium.org>
Date: Tue May 22 18:44:17 2018

Move common code for serving offline pages to OfflinePageRequestHandler

OfflinePageRequestJob and OfflinePageURLLoader (will be added in next
patch to support network servicification) will create and hold
OfflinePageRequestHandler. The specific behaviors for url request job
and url loader are encapsulated in OfflinePageRequestHandler::Delegate
which will be implemented accordingly.

OfflinePageRequestHandlerTest is also to pull out common testing code.
For now, only one type OfflinePageRequestJobBuilder is added to test
OfflinePageRequestJob. I will add a new type to test new URLLoader in
next patch.


Bug:  841617 
Change-Id: I1cd9b8e03358bc18d6d08e2d038be579de10dc42
Reviewed-on: https://chromium-review.googlesource.com/1058449
Commit-Queue: Jian Li <jianli@chromium.org>
Reviewed-by: Dmitry Titov <dimich@chromium.org>
Cr-Commit-Position: refs/heads/master@{#560715}
[modify] https://crrev.com/e4f685ee45e7061733041e81d90cd95bcfd5f8de/chrome/browser/BUILD.gn
[modify] https://crrev.com/e4f685ee45e7061733041e81d90cd95bcfd5f8de/chrome/browser/offline_pages/offline_page_request_handler.cc
[modify] https://crrev.com/e4f685ee45e7061733041e81d90cd95bcfd5f8de/chrome/browser/offline_pages/offline_page_request_handler.h
[modify] https://crrev.com/e4f685ee45e7061733041e81d90cd95bcfd5f8de/chrome/browser/offline_pages/offline_page_request_handler_unittest.cc
[modify] https://crrev.com/e4f685ee45e7061733041e81d90cd95bcfd5f8de/chrome/browser/offline_pages/offline_page_request_job.cc
[modify] https://crrev.com/e4f685ee45e7061733041e81d90cd95bcfd5f8de/chrome/browser/offline_pages/offline_page_request_job.h
[delete] https://crrev.com/f5604624408647a8ea06e6c884a9a2a0004df05a/chrome/browser/offline_pages/offline_page_request_job_unittest.cc
[modify] https://crrev.com/e4f685ee45e7061733041e81d90cd95bcfd5f8de/chrome/browser/offline_pages/offline_page_tab_helper.cc
[modify] https://crrev.com/e4f685ee45e7061733041e81d90cd95bcfd5f8de/chrome/test/BUILD.gn

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/de7b43799b76ba30deae3a2261f6c80f9cb0f013

commit de7b43799b76ba30deae3a2261f6c80f9cb0f013
Author: Jian Li <jianli@chromium.org>
Date: Fri Jun 01 23:22:13 2018

Support offline page serving for network servicification

OfflinePageURLLoader is introduced to intercept a request for
serving offline pages. It creates and holds OfflinePageRequestHandler
which contains all the common request handling logic for both
url request job and url loader. OfflinePageURLLoader implements
OfflinePageRequestHandler::Delegate in order to provide custom
logic.

Bug:  841617 
Change-Id: I12c88a919769aa4d743d4dcb3dafc7617921cdc6
Reviewed-on: https://chromium-review.googlesource.com/1069724
Reviewed-by: Carlos Knippschild <carlosk@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Peter Williamson <petewil@chromium.org>
Commit-Queue: Jian Li <jianli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#563855}
[modify] https://crrev.com/de7b43799b76ba30deae3a2261f6c80f9cb0f013/chrome/browser/BUILD.gn
[modify] https://crrev.com/de7b43799b76ba30deae3a2261f6c80f9cb0f013/chrome/browser/chrome_content_browser_client.cc
[modify] https://crrev.com/de7b43799b76ba30deae3a2261f6c80f9cb0f013/chrome/browser/chrome_content_browser_client.h
[modify] https://crrev.com/de7b43799b76ba30deae3a2261f6c80f9cb0f013/chrome/browser/offline_pages/offline_page_request_handler.cc
[modify] https://crrev.com/de7b43799b76ba30deae3a2261f6c80f9cb0f013/chrome/browser/offline_pages/offline_page_request_handler.h
[modify] https://crrev.com/de7b43799b76ba30deae3a2261f6c80f9cb0f013/chrome/browser/offline_pages/offline_page_request_handler_unittest.cc
[modify] https://crrev.com/de7b43799b76ba30deae3a2261f6c80f9cb0f013/chrome/browser/offline_pages/offline_page_request_job.cc
[add] https://crrev.com/de7b43799b76ba30deae3a2261f6c80f9cb0f013/chrome/browser/offline_pages/offline_page_url_loader.cc
[add] https://crrev.com/de7b43799b76ba30deae3a2261f6c80f9cb0f013/chrome/browser/offline_pages/offline_page_url_loader.h
[add] https://crrev.com/de7b43799b76ba30deae3a2261f6c80f9cb0f013/chrome/browser/offline_pages/offline_page_url_loader_request_interceptor.cc
[add] https://crrev.com/de7b43799b76ba30deae3a2261f6c80f9cb0f013/chrome/browser/offline_pages/offline_page_url_loader_request_interceptor.h

 Issue 803671  has been merged into this issue.

Does offline pages have other dependencies or is it ready to run in a service-manager only world? (not full browser startup)

Offline pages are ready to run in full browser world (tested with about flag enabled). The only missing piece is from the previews that is used by offline pages to decide if offline page should be served if the previews is triggered. The previews team is working on the servicification of this.