Test calling getPropertyValue on computed styles for border radius properties.

getPropertyValue(-webkit-border-top-right-radius): 10px 20px
getPropertyValue(-webkit-border-top-right-radius): 10px
getPropertyValue(-webkit-border-top-left-radius): 10px 20px
getPropertyValue(-webkit-border-top-left-radius): 10px
getPropertyValue(-webkit-border-bottom-right-radius): 10px 20px
getPropertyValue(-webkit-border-bottom-right-radius): 10px
getPropertyValue(-webkit-border-bottom-left-radius): 10px 20px
getPropertyValue(-webkit-border-bottom-left-radius): 10px

Test getting 0px value border radius.
getPropertyValue(-webkit-border-top-left-radius): 0px
getPropertyValue(-webkit-border-top-left-radius): 0px