Revert of [Offline pages] Integrate snapshot controller fully into background loader.

Revert of [Offline pages] Integrate snapshot controller fully into background loader. (patchset #2 id:20001 of https://codereview.chromium.org/2769043002/ )

Reason for revert:
Causes crash, crbug/706279

Original issue's description:
> [Offline pages] Integrate snapshot controller fully into background loader.
> 
> BUG=705753
> 
> Review-Url: https://codereview.chromium.org/2769043002
> Cr-Commit-Position: refs/heads/master@{#459967}
> Committed: https://chromium.googlesource.com/chromium/src/+/e101d81bbdb680bd24286fab8d799c5116257744

TBR=petewil@chromium.org,fgorski@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=705753

[chili, 2017-03-30 08:11:06]

Created Revert of [Offline pages] Integrate snapshot controller fully into
background loader.

[chili, 2017-03-30 08:13:19]

chili@chromium.org changed reviewers:
+ kgnaidu@google.com
- fgorski@chromium.org, petewil@chromium.org

[chili, 2017-03-30 08:13:19]

Reverting because fixing patch (https://codereview.chromium.org/2779983005/) is
taking a little longer than expected

[chili, 2017-03-30 08:13:51]

chili@chromium.org changed reviewers:
+ fgorski@chromium.org

[chili, 2017-03-30 14:53:38]

Description was changed from

==========
Revert of [Offline pages] Integrate snapshot controller fully into background
loader. (patchset #2 id:20001 of https://codereview.chromium.org/2769043002/ )

Reason for revert:
Causes crash, crbug/706279

Original issue's description:
> [Offline pages] Integrate snapshot controller fully into background loader.
> 
> BUG=705753
> 
> Review-Url: https://codereview.chromium.org/2769043002
> Cr-Commit-Position: refs/heads/master@{#459967}
> Committed:
https://chromium.googlesource.com/chromium/src/+/e101d81bbdb680bd24286fab8d79...

TBR=petewil@chromium.org,fgorski@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=705753
==========

to

==========
Revert of [Offline pages] Integrate snapshot controller fully into background
loader. (patchset #2 id:20001 of https://codereview.chromium.org/2769043002/ )

Reason for revert:
Causes crash, crbug/706279

Original issue's description:
> [Offline pages] Integrate snapshot controller fully into background loader.
> 
> BUG=705753
> 
> Review-Url: https://codereview.chromium.org/2769043002
> Cr-Commit-Position: refs/heads/master@{#459967}
> Committed:
https://chromium.googlesource.com/chromium/src/+/e101d81bbdb680bd24286fab8d79...

TBR=petewil@chromium.org,fgorski@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=705753
==========

[Pete Williamson, 2017-03-30 17:35:14]

petewil@chromium.org changed reviewers:
+ petewil@chromium.org

[Pete Williamson, 2017-03-30 17:35:15]

lgtm