Checkbox and Radio button incorrect animation

Created by: mixedCase

Both widgets should only have their content (tick and color fill in checkbox, inner circle in radio button) animated, not the black outline (altough the color should change).

Examples: https://elements.polymer-project.org/elements/paper-checkbox?view=demo:demo/index.html https://elements.polymer-project.org/elements/paper-radio-group?view=demo:demo/index.html