Add test expectation for fast/dom/HTMLImageElement/image-sizes-js-change.html

NOTRY=true
TBR=mkwst
BUG=426041,424178

Review URL: https://codereview.chromium.org/656633003

git-svn-id: svn://svn.chromium.org/blink/trunk@184197 bbb929c8-8fbe-4397-9dbb-9b2b20218538