Revert "Reland "[Background Fetch] Move all updatable UI options to their own proto.""

This reverts commit 9311d41253fc74d49527fb2ee69e0363334b969d.

Reason for revert:

Findit (https://goo.gl/kROfz5) identified CL at revision 577500 as the
culprit for failures in the build cycles as shown on:
https://findit-for-me.appspot.com/waterfall/culprit?key=ag9zfmZpbmRpdC1mb3ItbWVyRAsSDVdmU3VzcGVjdGVkQ0wiMWNocm9taXVtLzkzMTFkNDEyNTNmYzc0ZDQ5NTI3ZmIyZWU2OWUwMzYzMzM0Yjk2OWQM

Sample Failed Build: https://ci.chromium.org/buildbot/chromium.win/Win%207%20Tests%20x64%20%281%29/41118

Sample Failed Step: viz_content_unittests

Original change's description:
> Reland "[Background Fetch] Move all updatable UI options to their own proto."
> 
> This is a reland of d3981964f2499033059aae600732d656370e0ddf
> 
> TBR=avi@chromium.org
> 
> Original change's description:
> > [Background Fetch] Move all updatable UI options to their own proto.
> >
> > Bundle up the icon and the title since they will be accessed/modified
> > together in the updateUI call.
> >
> > It also makes sense to move the icon from the metadata proto since that
> > will speed up getting the registration info.
> >
> > TBR=avi@chromium.org
> >
> > Bug: 865063
> > Change-Id: I661062f19fddfa6b9c3bf11b5e146d5289a02593
> > Reviewed-on: https://chromium-review.googlesource.com/1146650
> > Commit-Queue: Rayan Kanso <rayankans@chromium.org>
> > Reviewed-by: Avi Drissman <avi@chromium.org>
> > Reviewed-by: Peter Beverloo <peter@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#577272}
> 
> Bug: 865063
> Change-Id: I77567e8e2e0ea59ede514c77b40326e7ece48a25
> Reviewed-on: https://chromium-review.googlesource.com/1148261
> Commit-Queue: Rayan Kanso <rayankans@chromium.org>
> Reviewed-by: Peter Beverloo <peter@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#577500}

Change-Id: I60aa46070806c053cc60d77b32456d192de378c8
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 865063
Reviewed-on: https://chromium-review.googlesource.com/1148500
Cr-Commit-Position: refs/heads/master@{#577559}

• content/browser/BUILD.gn[diff]
• content/browser/background_fetch/background_fetch.proto[diff]
• content/browser/background_fetch/background_fetch_data_manager_unittest.cc[diff]
• content/browser/background_fetch/storage/README.md[diff]
• content/browser/background_fetch/storage/create_metadata_task.cc[diff]
• content/browser/background_fetch/storage/create_metadata_task.h[diff]
• content/browser/background_fetch/storage/database_helpers.cc[diff]
• content/browser/background_fetch/storage/database_helpers.h[diff]
• content/browser/background_fetch/storage/delete_registration_task.cc[diff]
• content/browser/background_fetch/storage/get_initialization_data_task.cc[diff]
• content/browser/background_fetch/storage/image_helpers.cc[Deleted - diff]
• content/browser/background_fetch/storage/image_helpers.h[Deleted - diff]
• content/browser/background_fetch/storage/image_helpers_unittest.cc[Deleted - diff]
• content/browser/background_fetch/storage/update_registration_ui_task.cc[diff]
• content/browser/background_fetch/storage/update_registration_ui_task.h[diff]
• content/test/BUILD.gn[diff]