Dump icon change events in the icon-url-property test.
https://bugs.webkit.org/show_bug.cgi?id=112647

Reviewed by Jochen Eisinger.

This allows us to check that the didChangeIcon callback
is being done when it should be done. This test stopped
testing that in r122806 but it did before that.

* fast/dom/icon-url-property-expected.txt:
* fast/dom/icon-url-property.html:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146173 268f45cc-cd09-0410-ab3c-d52691b4dbfc