IDL compiler: 3 special types for methods

This adds support for 3 special types:
* DOMStringList (already supported by v8_types)
* NodeFilter
* XPathNSResolver

This leaves 2 other special cases that I'm aware of:
* Dictionary
* SerializedScriptValue

BUG=239771
NOTRY=true

Review URL: https://codereview.chromium.org/52173002

git-svn-id: svn://svn.chromium.org/blink/trunk@160916 bbb929c8-8fbe-4397-9dbb-9b2b20218538