The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f25963e5ad7ca9e19db5ac255e4225145593e221

commit f25963e5ad7ca9e19db5ac255e4225145593e221
Author: peter <peter@chromium.org>
Date: Fri Apr 07 17:06:19 2017

Set the Content-Type and Content-Length headers for BG Fetch

While we work on being able to relay all response headers from the
download system to the created Response object for Background Fetch,
these two will enable some minimum experimentation.

BUG= 692579 ,  709489 

Review-Url: https://codereview.chromium.org/2805813006
Cr-Commit-Position: refs/heads/master@{#462899}

[modify] https://crrev.com/f25963e5ad7ca9e19db5ac255e4225145593e221/content/browser/background_fetch/background_fetch_data_manager.cc
[modify] https://crrev.com/f25963e5ad7ca9e19db5ac255e4225145593e221/content/browser/background_fetch/background_fetch_request_info.cc
[modify] https://crrev.com/f25963e5ad7ca9e19db5ac255e4225145593e221/content/browser/background_fetch/background_fetch_request_info.h
[modify] https://crrev.com/f25963e5ad7ca9e19db5ac255e4225145593e221/content/browser/background_fetch/background_fetch_service_unittest.cc
[modify] https://crrev.com/f25963e5ad7ca9e19db5ac255e4225145593e221/content/browser/background_fetch/background_fetch_test_base.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/87a42b7af9035be518adf40266e4a3b1463186fd

commit 87a42b7af9035be518adf40266e4a3b1463186fd
Author: peter <peter@chromium.org>
Date: Wed Apr 12 10:10:56 2017

Make the download's response headers available in the DownloadItem

Background Fetch will give this developer back to the developer, and use
it to determine whether the request was "ok". That information will also
be used to determine which Service Worker event to invoke.

The response headers will not be stored in the download database, so
requires the download to either have been started or resumed in the
current session.

BUG= 709489 

Review-Url: https://codereview.chromium.org/2809953002
Cr-Commit-Position: refs/heads/master@{#463982}

[modify] https://crrev.com/87a42b7af9035be518adf40266e4a3b1463186fd/content/browser/download/download_create_info.cc
[modify] https://crrev.com/87a42b7af9035be518adf40266e4a3b1463186fd/content/browser/download/download_create_info.h
[modify] https://crrev.com/87a42b7af9035be518adf40266e4a3b1463186fd/content/browser/download/download_item_impl.cc
[modify] https://crrev.com/87a42b7af9035be518adf40266e4a3b1463186fd/content/browser/download/download_item_impl.h
[modify] https://crrev.com/87a42b7af9035be518adf40266e4a3b1463186fd/content/browser/download/download_item_impl_unittest.cc
[modify] https://crrev.com/87a42b7af9035be518adf40266e4a3b1463186fd/content/browser/download/download_request_core.cc
[modify] https://crrev.com/87a42b7af9035be518adf40266e4a3b1463186fd/content/public/browser/download_item.h
[modify] https://crrev.com/87a42b7af9035be518adf40266e4a3b1463186fd/content/public/test/fake_download_item.cc
[modify] https://crrev.com/87a42b7af9035be518adf40266e4a3b1463186fd/content/public/test/fake_download_item.h
[modify] https://crrev.com/87a42b7af9035be518adf40266e4a3b1463186fd/content/public/test/mock_download_item.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0b6bb8eb5aa2c306f7ad88a746bbec775c18b103

commit 0b6bb8eb5aa2c306f7ad88a746bbec775c18b103
Author: peter <peter@chromium.org>
Date: Wed Apr 12 19:54:55 2017

Pass through the response code and headers in Background Fetch

Following this CL, Background Fetch responses will include the response
code and headers as provided by the download manager.

We don't yet support the `backgroundfetchfail` event or handle CORS, but
those can now be implemented in follow-up CLs.

BUG= 709489 

Review-Url: https://codereview.chromium.org/2814683003
Cr-Commit-Position: refs/heads/master@{#464119}

[modify] https://crrev.com/0b6bb8eb5aa2c306f7ad88a746bbec775c18b103/content/browser/background_fetch/background_fetch_data_manager.cc
[modify] https://crrev.com/0b6bb8eb5aa2c306f7ad88a746bbec775c18b103/content/browser/background_fetch/background_fetch_job_controller_unittest.cc
[modify] https://crrev.com/0b6bb8eb5aa2c306f7ad88a746bbec775c18b103/content/browser/background_fetch/background_fetch_request_info.cc
[modify] https://crrev.com/0b6bb8eb5aa2c306f7ad88a746bbec775c18b103/content/browser/background_fetch/background_fetch_request_info.h
[modify] https://crrev.com/0b6bb8eb5aa2c306f7ad88a746bbec775c18b103/content/browser/background_fetch/background_fetch_service_unittest.cc
[modify] https://crrev.com/0b6bb8eb5aa2c306f7ad88a746bbec775c18b103/content/browser/background_fetch/background_fetch_test_base.cc
[modify] https://crrev.com/0b6bb8eb5aa2c306f7ad88a746bbec775c18b103/content/browser/background_fetch/background_fetch_test_base.h