Fix the Download Notifications for Offline Pages to indicate bytes loaded.

Fix the Download Notifications for Offline Pages to indicate bytes loaded.

This wires the UpdateProgress call from PrerenderingOffliner via DownloadUIAdapter to the DownloadNotifyingObserver. As a result, the Android notifications about ongoing Offline Page downloads start to be updated with a real byte count.

BUG=698020
Review-Url: https://codereview.chromium.org/2736843002
Cr-Commit-Position: refs/heads/master@{#455486}
(cherry picked from commit 0e2f6cb4e64a3d6c251e9aa782927cffb829a5d3)

Review-Url: https://codereview.chromium.org/2742833004 .
Cr-Commit-Position: refs/branch-heads/3029@{#101}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed: https://chromium.googlesource.com/chromium/src/+/5272c36578a4bca85626b8f27eeea4d790749383

[Dmitry Titov, 2017-03-10 00:22:14]

Description was changed from

==========
Fix the Download Notifications for Offline Pages to indicate bytes loaded.

This wires the UpdateProgress call from PrerenderingOffliner via
DownloadUIAdapter to the DownloadNotifyingObserver. As a result, the Android
notifications about ongoing Offline Page downloads start to be updated with a
real byte count.

BUG=698020

Review-Url: https://codereview.chromium.org/2736843002
Cr-Commit-Position: refs/heads/master@{#455486}
(cherry picked from commit 0e2f6cb4e64a3d6c251e9aa782927cffb829a5d3)
==========

to

==========
Fix the Download Notifications for Offline Pages to indicate bytes loaded.

This wires the UpdateProgress call from PrerenderingOffliner via
DownloadUIAdapter to the DownloadNotifyingObserver. As a result, the Android
notifications about ongoing Offline Page downloads start to be updated with a
real byte count.

BUG=698020

Review-Url: https://codereview.chromium.org/2736843002
Cr-Commit-Position: refs/heads/master@{#455486}
(cherry picked from commit 0e2f6cb4e64a3d6c251e9aa782927cffb829a5d3)

Review-Url: https://codereview.chromium.org/2742833004 .
Cr-Commit-Position: refs/branch-heads/3029@{#101}
Cr-Branched-From:
939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed:
https://chromium.googlesource.com/chromium/src/+/5272c36578a4bca85626b8f27eee...
==========

[Dmitry Titov, 2017-03-10 00:22:15]

Committed patchset #1 (id:1) manually as
5272c36578a4bca85626b8f27eeea4d790749383 (presubmit successful).