To prevent redundant (and sometimes incorrect) change/diff loads, this
change moves the logic for rewriting the URL schema to within the
router.
This has the drawback of adding a step -- and a potential API call --
between initial URL interpretation and first render, but ensures that
render will be correct. This only occurs when legacy routes are used.
Bug: Issue 7027
Change-Id: Ia1571e2f946f6d9e334626b6b0fd4a8c0c81f35d
eb7e7b80cf