Web Inspector: Frontend Error when selecting Database folder in Resources Sidebar
https://bugs.webkit.org/show_bug.cgi?id=126029

Patch by Joseph Pecoraro <pecoraro@apple.com> on 2013-12-19
Reviewed by Timothy Hatcher.

Treat the DatabaseHostTreeElement tree element like a folder. It pretty much
is a folder, but inherits from StorageTreeElement to share some code there.

* UserInterface/ResourceSidebarPanel.js:
(WebInspector.ResourceSidebarPanel.prototype._treeElementSelected):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@160897 268f45cc-cd09-0410-ab3c-d52691b4dbfc