IDL compiler: [ExceptionState] with callback interface arguments

Test-only change (exercise other code path); code already implemented.
This finishes callback interface arguments.

BUG=239771
TBR=haraken
NOTRY=true

Review URL: https://codereview.chromium.org/130453002

git-svn-id: svn://svn.chromium.org/blink/trunk@164735 bbb929c8-8fbe-4397-9dbb-9b2b20218538