Tests that adding an @import with data URI does not lead to stylesheet collection crbug.com/644719


== Matched rules before @import added ==

[expanded] 
element.style { ()

[expanded] 
span { (<style>)
    color: red;


== Matched rules after @import added ==

[expanded] 
element.style { ()

[expanded] 
span { (data:text/c…or:green}:1 -> data:text/css,span{color:green}:1:6)
    color: green;