Convert line endings of zoom-img-preserveAspectRatio-support-1.html to unix

BUG=345027
R=japhet@chromium.org

Review URL: https://codereview.chromium.org/211903002

git-svn-id: svn://svn.chromium.org/blink/trunk@169981 bbb929c8-8fbe-4397-9dbb-9b2b20218538