Use existing unicode.sky instead of re-inventing
Use existing unicode.sky instead of re-inventing

I somehow missed this function the first time.

This is already tested by
tests/framework/xmlhttprequest/unicode-post.sky

R=esprehn@chromium.org
BUG=

Review URL: https://codereview.chromium.org/806043002

chinmaygarde/mojo,chinmaygarde/mojo,afandria/mojo,afandria/mojo,collinjackson/mojo,afandria/mojo,collinjackson/mojo,chinmaygarde/mojo,chinmaygarde/mojo,jianglu/mojo,chinmaygarde/mojo,collinjackson/mojo,collinjackson/mojo,chinmaygarde/mojo,jianglu/mojo,afandria/mojo,afandria/mojo,collinjackson/mojo,collinjackson/mojo,afandria/mojo,jianglu/mojo,chinmaygarde/mojo,jianglu/mojo,collinjackson/mojo,jianglu/mojo,afandria/mojo,chinmaygarde/mojo,collinjackson/mojo,collinjackson/mojo,jianglu/mojo,jianglu/mojo,afandria/mojo,chinmaygarde/mojo,jianglu/mojo