The bonus healing/shielding yes, the resistances no.
Your heals and shields are 10% stronger. Additionally, heals and shields on allies increase your target's armor by 5 - 22 (based on level) and magic resistance by 2.5 - 11 (based on level) for 3 seconds.
Healing increase, yes.
Bonus resistances, no.
So wouldn't it be good to do this on Vlad?
It could work on sustain-heavy champs like vlad or swain. But going 18 into resolve instead, you still pick up Runic Armor which is about as good as windspeaker's for the bonus healing, and the other masteries in that tree are generally much more attractive for those champs, too.