CL https://codereview.chromium.org/1863053003/ added support for most
syntactic constructs in relation to generic methods/functions, and
this one adds the missing ones: Declarations of function typed arguments
with type parameters, declarations of generic local functions, and
declarations of generic literal function expressions. It also adds
support for `super` bounds, because they were discussed recently and
may be quite useful (and it turns out to be no problem to parse them).
Finally, a new test file is added to tests the additional constructs.
BUG=
R=johnniwinther@google.com
Review URL: https://codereview.chromium.org/1878253002 .
Erik Ernst