Web Inspector: Flame Chart. Stick item color to the function.
https://bugs.webkit.org/show_bug.cgi?id=111697

Reviewed by Yury Semikhatsky.

Different nodes associated with a single function have to use the same color.
Minor polish: do not filter out (idle) and (program) items. They were big due to an error on v8 side.
Set minimum width to 0 for more precise picture.

* inspector/front-end/FlameChart.js:
(WebInspector.FlameChart):
(WebInspector.FlameChart.prototype._rootNodes):
(WebInspector.FlameChart.prototype.draw):
(WebInspector.FlameChart.prototype._drawNode):
(WebInspector.FlameChart.prototype._drawBar):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@145065 268f45cc-cd09-0410-ab3c-d52691b4dbfc