The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/cf2b3737af6bc079f56c445cb70d49c644db3f88

commit cf2b3737af6bc079f56c445cb70d49c644db3f88
Author: Rayan Kanso <rayankans@chromium.org>
Date: Fri Jan 11 11:36:56 2019

[Background Fetch] Split download/upload progress in the delegate.

- Pass download/upload stats from storage to the delegate
- Keep track of in progress upload/download progress per request
- Rename variables for consistency

Bug: 919864, 774054
Change-Id: I7bf78a0e688753584bde51233ecd8c9f9b1049cd
Reviewed-on: https://chromium-review.googlesource.com/c/1405009
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Mugdha Lakhani <nator@google.com>
Reviewed-by: Peter Beverloo <peter@chromium.org>
Commit-Queue: Rayan Kanso <rayankans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#621974}
[modify] https://crrev.com/cf2b3737af6bc079f56c445cb70d49c644db3f88/chrome/browser/background_fetch/background_fetch_delegate_impl.cc
[modify] https://crrev.com/cf2b3737af6bc079f56c445cb70d49c644db3f88/chrome/browser/background_fetch/background_fetch_delegate_impl.h
[modify] https://crrev.com/cf2b3737af6bc079f56c445cb70d49c644db3f88/content/browser/background_fetch/background_fetch_delegate_proxy_unittest.cc
[modify] https://crrev.com/cf2b3737af6bc079f56c445cb70d49c644db3f88/content/browser/background_fetch/background_fetch_job_controller.cc
[modify] https://crrev.com/cf2b3737af6bc079f56c445cb70d49c644db3f88/content/public/browser/background_fetch_description.cc
[modify] https://crrev.com/cf2b3737af6bc079f56c445cb70d49c644db3f88/content/public/browser/background_fetch_description.h