One more Mac rebaseline.

* platform/mac/fast/dom/HTMLInputElement/input-image-alt-text-expected.png:
* platform/mac/fast/dom/HTMLInputElement/input-image-alt-text-expected.txt:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150315 268f45cc-cd09-0410-ab3c-d52691b4dbfc