(Fix landed) Revert of [CrOS Tether] Create HostScanCache, which caches scan results and inserts...

Revert of [CrOS Tether] Create HostScanCache, which caches scan results and inserts them into the network sta… (patchset #8 id:140001 of https://codereview.chromium.org/2852693004/ )

Reason for revert:

Findit (https://goo.gl/kROfz5) identified CL at revision 468705 as the
culprit for failures in the build cycles as shown on:
https://findit-for-me.appspot.com/waterfall/culprit?key=ag9zfmZpbmRpdC1mb3ItbWVyRAsSDVdmU3VzcGVjdGVkQ0wiMWNocm9taXVtLzZiNWI3ZGUxMDM3NjQzNDA3MTFiYzk3MDg3OWNhZjRhZmVhYjIzYjAM

Original issue's description:
> [CrOS Tether] Create HostScanCache, which caches scan results and inserts them into the network stack.
> 
> This CL also includes some code in the network stack to pipe scan results through and also includes a refactor of HostScanner, since that was the class which previously was in charge of passing scan results to the network stack.
> 
> BUG=672263
> 
> Review-Url: https://codereview.chromium.org/2852693004
> Cr-Commit-Position: refs/heads/master@{#468705}
> Committed: https://chromium.googlesource.com/chromium/src/+/6b5b7de103764340711bc970879caf4afeab23b0

TBR=stevenjb@chromium.org,hansberry@chromium.org,khorimoto@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=672263

[findit-for-me, 2017-05-02 19:07:43]

Created Revert of [CrOS Tether] Create HostScanCache, which caches scan results
and inserts them into the network sta…

[Kyle Horimoto, 2017-05-02 19:14:38]

On 2017/05/02 19:07:43, findit-for-me wrote:
> Created Revert of [CrOS Tether] Create HostScanCache, which caches scan
results
> and inserts them into the network sta…

I have a fix; let's land this instead:
https://codereview.chromium.org/2857723002

[Ryan Hansberry, 2017-05-03 20:27:41]

Description was changed from

==========
Revert of [CrOS Tether] Create HostScanCache, which caches scan results and
inserts them into the network sta… (patchset #8 id:140001 of
https://codereview.chromium.org/2852693004/ )

Reason for revert:

Findit (https://goo.gl/kROfz5) identified CL at revision 468705 as the
culprit for failures in the build cycles as shown on:
https://findit-for-me.appspot.com/waterfall/culprit?key=ag9zfmZpbmRpdC1mb3Itb...

Original issue's description:
> [CrOS Tether] Create HostScanCache, which caches scan results and inserts them
into the network stack.
> 
> This CL also includes some code in the network stack to pipe scan results
through and also includes a refactor of HostScanner, since that was the class
which previously was in charge of passing scan results to the network stack.
> 
> BUG=672263
> 
> Review-Url: https://codereview.chromium.org/2852693004
> Cr-Commit-Position: refs/heads/master@{#468705}
> Committed:
https://chromium.googlesource.com/chromium/src/+/6b5b7de103764340711bc970879c...

TBR=stevenjb@chromium.org,hansberry@chromium.org,khorimoto@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=672263
==========

to

==========
Revert of [CrOS Tether] Create HostScanCache, which caches scan results and
inserts them into the network sta… (patchset #8 id:140001 of
https://codereview.chromium.org/2852693004/ )

Reason for revert:

Findit (https://goo.gl/kROfz5) identified CL at revision 468705 as the
culprit for failures in the build cycles as shown on:
https://findit-for-me.appspot.com/waterfall/culprit?key=ag9zfmZpbmRpdC1mb3Itb...

Original issue's description:
> [CrOS Tether] Create HostScanCache, which caches scan results and inserts them
into the network stack.
> 
> This CL also includes some code in the network stack to pipe scan results
through and also includes a refactor of HostScanner, since that was the class
which previously was in charge of passing scan results to the network stack.
> 
> BUG=672263
> 
> Review-Url: https://codereview.chromium.org/2852693004
> Cr-Commit-Position: refs/heads/master@{#468705}
> Committed:
https://chromium.googlesource.com/chromium/src/+/6b5b7de103764340711bc970879c...

TBR=stevenjb@chromium.org,hansberry@chromium.org,khorimoto@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=672263
==========