Web Inspector: Modify FolderTreeElement to have a Collection as a its represented object

[Devin Rousso]

In order to allow folder's to be selectable and show content, it it necessary for them to know what content to display.  Now that we have the general WI.Collection model object, we can leverage this by making all WI.FolderTreeElement instances have a representedObject that is a WI.Collection of all its children.

[Radar WebKit Bug Importer]

<rdar://problem/29078775>

[Devin Rousso]

Created attachment 293712 [details]
Patch

[Timothy Hatcher]

Comment on attachment 293712 [details]
Patch

Matt, can you review this. It touches code you added, re: countChildrenCallback.

[Matt Baker]

Comment on attachment 293712 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=293712&action=review

r=me, use of Collection really makes this code cleaner!

> Source/WebInspectorUI/UserInterface/Views/FolderTreeElement.js:28
> +    constructor(title, representedObject)

Nice cleanup.

> Source/WebInspectorUI/UserInterface/Views/FolderTreeElement.js:35
> +        super(classNames, title, subtitle, representedObject, hasChildren);

Just naming the bool is probably sufficient, but I don't feel too strongly about it.

> Source/WebInspectorUI/UserInterface/Views/FrameTreeElement.js:56
> +        for (let [key, value] of Object.entries(WebInspector.Resource.Type)) {

Object.entries, cool!

[WebKit Commit Bot]

Comment on attachment 293712 [details]
Patch

Clearing flags on attachment: 293712

Committed r208337: <http://trac.webkit.org/changeset/208337>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.