DevTools: [JsDocValidator] Implement inheritance consistency check

The check verifies that type JSDoc and __proto__ assignment are consistent.

R=eustas, loislo, vsevik, sergeyv

Review URL: https://codereview.chromium.org/110223010

git-svn-id: svn://svn.chromium.org/blink/trunk@164340 bbb929c8-8fbe-4397-9dbb-9b2b20218538