Revert of [DevTools] Added keyboard search while in sources (patchset #7 id:120001 of https://codereview.chromium.org/1831903002/ )

Reason for revert:
Screwed up timeline.

Original issue's description:
> [DevTools] Added keyboard search while in sources
>
> While in sources file explorer gives the ability to search/filter files
> by typing while panel is not blured. On blur event, click, esc or enter
> the filtering will cancel.
>
> The display underlines the matches found. If the user then uses arrow keys
> to navigate up and down only the filtered items should be selectable.
>
> R=lushnikov,pfeldman
> BUG=594654
>
> Committed: https://crrev.com/391574fa0e749ba67d59c7b7bdb8eb33624fa355
> Cr-Commit-Position: refs/heads/master@{#387079}

[email protected],[email protected]
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=594654

Review URL: https://codereview.chromium.org/1889933003

Cr-Commit-Position: refs/heads/master@{#387763}
3 files changed