Web Inspector: Flame Chart. Extract item to coordinates conversion into a separate function.
https://bugs.webkit.org/show_bug.cgi?id=113682

Reviewed by Yury Semikhatsky.

The calculation was extracted into entryToAnchorBox.

Drive by fixes: unnecessary members were removed.

* inspector/front-end/FlameChart.js:
(WebInspector.FlameChart):
(WebInspector.FlameChart.Entry):
(WebInspector.FlameChart.prototype._calculateTimelineData):
(WebInspector.FlameChart.prototype._calculateTimelineDataForSamples):
(WebInspector.FlameChart.prototype._getPopoverAnchor):
(WebInspector.FlameChart.prototype._entryToAnchorBox):
(WebInspector.FlameChart.prototype.draw):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147308 268f45cc-cd09-0410-ab3c-d52691b4dbfc