Previously they were always inline.
MWExtensionNode is now a mixin and classes which inherit it should
now inherit MWBlockExtensionNode or MWInlineExtensionNode.
Change-Id: I0ddcabeb63acdf852e252c41add5233c00723f4c
Update DM node constructors for I81c60d4a in VE core.
New changes:
2587549 [BREAKING CHANGE] Fix Node construction arguments
Change-Id: I8d4f37b631fe85a78c72407937477963ac49f87a
I told James this wasn't needed, but I was wrong. It is null in
the parent class, and DOM throws on document.createElement(null).
Bug: 60307
Change-Id: Iff8fda9acf9f37e537d7d6cf6106a801d6b71338
