Web Inspector: REGRESSION: virtualized TreeOutline is empty when filtering

[Devin Rousso]

STEPS TO REPRODUCE:
1. Open WebInspector to a page with a 2D canvas
2. Take a recording of the 2D canvas (try to find one with a few thousand actions)
3. Filter by "as" among the recording actions in the NavigationSidebar
4. Backspace the text in the filter box to just have "a"
 => Nothing appears, including no "No Filter Results"

[Devin Rousso]

Created attachment 348115 [details]
Patch

[BJ Burg]

Comment on attachment 348115 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=348115&action=review

r=me but please make it more readable

> Source/WebInspectorUI/UserInterface/Views/TreeElement.js:169
> +            this.treeOutline.soon.updateVirtualizedElements(!this._hidden && this.selected ? this : null);

Pls extract this condition out so I know what the logic is trying to compute. i.e., let focusedTreeElement = ...

[Devin Rousso]

Created attachment 348151 [details]
Patch

[WebKit Commit Bot]

Comment on attachment 348151 [details]
Patch

Clearing flags on attachment: 348151

Committed r235377: <https://trac.webkit.org/changeset/235377>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Radar WebKit Bug Importer]

<rdar://problem/43757744>