[Offline Pages] Allow BackgroundLoader to track network bytes using prerenderer hook-in.

[Offline Pages] Allow BackgroundLoader to track network bytes using prerenderer hook-in.

While this hook-in is less than ideal, allow us to unblock while architecting a better solution that will account for bytes, does not block net moving OOP, and at a rate frequent enough to be suitable.

BUG=697695
Review-Url: https://codereview.chromium.org/2737343002
Cr-Commit-Position: refs/heads/master@{#457163}
(cherry picked from commit f2fc623943d585acb44512ebafb626acd7b3f217)

Review-Url: https://codereview.chromium.org/2748053004 .
Cr-Commit-Position: refs/branch-heads/3029@{#217}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed: https://chromium.googlesource.com/chromium/src/+/4aab820ad80af5963d9531184bb0cd24a5029c9a

[dewittj, 2017-03-15 21:07:27]

Description was changed from

==========
[Offline Pages] Allow BackgroundLoader to track network bytes using prerenderer
hook-in.

While this hook-in is less than ideal, allow us to unblock while architecting a
better solution that will account for bytes, does not block net moving OOP, and
at a rate frequent enough to be suitable.

BUG=697695

Review-Url: https://codereview.chromium.org/2737343002
Cr-Commit-Position: refs/heads/master@{#457163}
(cherry picked from commit f2fc623943d585acb44512ebafb626acd7b3f217)
==========

to

==========
[Offline Pages] Allow BackgroundLoader to track network bytes using prerenderer
hook-in.

While this hook-in is less than ideal, allow us to unblock while architecting a
better solution that will account for bytes, does not block net moving OOP, and
at a rate frequent enough to be suitable.

BUG=697695

Review-Url: https://codereview.chromium.org/2737343002
Cr-Commit-Position: refs/heads/master@{#457163}
(cherry picked from commit f2fc623943d585acb44512ebafb626acd7b3f217)

Review-Url: https://codereview.chromium.org/2748053004 .
Cr-Commit-Position: refs/branch-heads/3029@{#217}
Cr-Branched-From:
939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed:
https://chromium.googlesource.com/chromium/src/+/4aab820ad80af5963d9531184bb0...
==========

[dewittj, 2017-03-15 21:07:28]

Committed patchset #1 (id:1) manually as
4aab820ad80af5963d9531184bb0cd24a5029c9a.