Web Inspector: timeline hangs on a page with deep chain of nested events.

Web Inspector: timeline hangs on a page with deep chain of nested events.
https://bugs.webkit.org/show_bug.cgi?id=79106

Use stack of states instead of recursive calls when traversing records tree to
avoid stack overflow.

Reviewed by Pavel Feldman.

* inspector/front-end/TimelineOverviewPane.js:
(WebInspector.TimelineOverviewPane.prototype._forAllRecords):
* inspector/front-end/TimelinePanel.js:
(WebInspector.TimelinePanel.prototype._filterRecords):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@108355 268f45cc-cd09-0410-ab3c-d52691b4dbfc