IDL compiler: [CheckSecurity=Frame] interface + [DoNotCheckSecurity] members

This finishes [CheckSecurity=Frame] interface support.

This also refactors tests, moving [DoNotCheckSecurity] members into the
separate [CheckSecurity] test, as [DoNotCheckSecurity] on a member is
meaningless w/o [CheckSecurity] on the interface.

It also adds other tests for various combinations of extended attributes
that do appear in actual IDL files (Location.idl and Window.idl).

Also removes a gratuitous comment that lists all the extended attributes.

I've kept this simple; there are various special cases that are not necessary
in general, but may need support in Location.idl and Window.idl, which I'll
need to check individually anyway.

Followup to:
IDL compiler: [CheckSecurity=Frame] interfaces (initial)
https://codereview.chromium.org/61523003/

BUG=239771

Review URL: https://codereview.chromium.org/77453002

git-svn-id: svn://svn.chromium.org/blink/trunk@162510 bbb929c8-8fbe-4397-9dbb-9b2b20218538