Port dom_utils_test.js to new shoulda.js syntax
Port dom_utils_test.js to new shoulda.js syntax

philc/vimium,philc/vimium,smblott-github/vimium,smblott-github/vimium,gdh1995/vimium,gdh1995/vimium,gdh1995/vimium,philc/vimium,smblott-github/vimium