Add additional sanity checks for implicit parameters, mainly to prevent passing
a wrong context, which can lead to obscure errors.
This is a regression test after https://crrev.com/da4f2491501e54d436ed448c5e345480d1f5906b

BUG=chromium:508898

Review-Url: https://codereview.chromium.org/2160563003
Cr-Commit-Position: refs/heads/master@{#37876}