* remove extra |if| around loop, and convert it from |while| to |for|.
* remove extra test for |result|
* rename |curdata| -> |prevdata| and |newdata| -> |data|.
* use |IsContentOfType| instead of |GetTag|
b=221531 r+sr=bzbarsky
git-svn-id: svn://10.0.0.236/trunk@147925 18797224-902f-48f8-a5cc-f745e15eee43