Forthcoming patch puts the Tokenizer class into its own file, moves the XMLTokenizer class declaration from XMLTokenizer.cpp to XMLTokenizer.h (I am unclear on why it was in the .cpp file in the first place), and does a little surrounding cleanup.
Created attachment 12301 [details] patch
Comment on attachment 12301 [details] patch r=me
Landed in r18669.
Mass moving XML DOM bugs to the "DOM" Component.