Use url:: instead of url_util:: url_parse:: url_canon::

BUG=364747
TEST=none, no functional changes

Review URL: https://codereview.chromium.org/245223004

git-svn-id: svn://svn.chromium.org/blink/trunk@172109 bbb929c8-8fbe-4397-9dbb-9b2b20218538