Revert of [DevTools] Filtered list enhancements

Revert of [DevTools] Filtered list enhancements (patchset #4 id:60001 of https://codereview.chromium.org/2781863003/ )

Reason for revert:
Breaks selection, don't think was necessary at first place!

Original issue's description:
> [DevTools] Filtered list enhancements
> 
> Some enhancements that are needed for the frames menu but also seem
> useful for other clients of the FilteredListWidget.
>   1. Selection is preserved while the filter string is being updated.
>   2. Items are highlighted on hover. Provider is notified when mouse
>      moves over the item.
>   3. It is now possible to set the selection.
> 
> BUG=698027
> 
> Review-Url: https://codereview.chromium.org/2781863003
> Cr-Commit-Position: refs/heads/master@{#460799}
> Committed: https://chromium.googlesource.com/chromium/src/+/76c041dbcc4de828135d0af8c39256c4861b1a01

TBR=dgozman@chromium.org,caseq@chromium.org,eostroukhov@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=698027
Review-Url: https://codereview.chromium.org/2793483002
Cr-Commit-Position: refs/heads/master@{#461239}
Committed: https://chromium.googlesource.com/chromium/src/+/6bf970e99a9672baf4de427eb35dc6f3b5d0b3cf

[pfeldman, 2017-03-31 01:05:37]

Created Revert of [DevTools] Filtered list enhancements

[pfeldman, 2017-03-31 21:51:05]

The CQ bit was checked by pfeldman@chromium.org

[commit-bot: I haz the power, 2017-03-31 21:51:39]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-03-31 21:53:18]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490997065316470, "parent_rev":
"ffdab5e343837739ef53675033fe9b38533263a3", "commit_rev":
"6bf970e99a9672baf4de427eb35dc6f3b5d0b3cf"}

[commit-bot: I haz the power, 2017-03-31 21:54:08]

Description was changed from

==========
Revert of [DevTools] Filtered list enhancements (patchset #4 id:60001 of
https://codereview.chromium.org/2781863003/ )

Reason for revert:
Breaks selection, don't think was necessary at first place!

Original issue's description:
> [DevTools] Filtered list enhancements
> 
> Some enhancements that are needed for the frames menu but also seem
> useful for other clients of the FilteredListWidget.
>   1. Selection is preserved while the filter string is being updated.
>   2. Items are highlighted on hover. Provider is notified when mouse
>      moves over the item.
>   3. It is now possible to set the selection.
> 
> BUG=698027
> 
> Review-Url: https://codereview.chromium.org/2781863003
> Cr-Commit-Position: refs/heads/master@{#460799}
> Committed:
https://chromium.googlesource.com/chromium/src/+/76c041dbcc4de828135d0af8c392...

TBR=dgozman@chromium.org,caseq@chromium.org,eostroukhov@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=698027
==========

to

==========
Revert of [DevTools] Filtered list enhancements (patchset #4 id:60001 of
https://codereview.chromium.org/2781863003/ )

Reason for revert:
Breaks selection, don't think was necessary at first place!

Original issue's description:
> [DevTools] Filtered list enhancements
> 
> Some enhancements that are needed for the frames menu but also seem
> useful for other clients of the FilteredListWidget.
>   1. Selection is preserved while the filter string is being updated.
>   2. Items are highlighted on hover. Provider is notified when mouse
>      moves over the item.
>   3. It is now possible to set the selection.
> 
> BUG=698027
> 
> Review-Url: https://codereview.chromium.org/2781863003
> Cr-Commit-Position: refs/heads/master@{#460799}
> Committed:
https://chromium.googlesource.com/chromium/src/+/76c041dbcc4de828135d0af8c392...

TBR=dgozman@chromium.org,caseq@chromium.org,eostroukhov@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=698027

Review-Url: https://codereview.chromium.org/2793483002
Cr-Commit-Position: refs/heads/master@{#461239}
Committed:
https://chromium.googlesource.com/chromium/src/+/6bf970e99a9672baf4de427eb35d...
==========

[commit-bot: I haz the power, 2017-03-31 21:54:09]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/6bf970e99a9672baf4de427eb35d...