Presumably the Walkout was a "fix this or we walk out" type of situation... but after Google refused to do 6/7ths of anything they demanded... they're still working for Google and not actively protesting. I would argue that Google called their bluff here.
A traditional protest against an employer, a strike, entails "give us this if you want us to return to work". Googlers walked out, made demands, and then walked right back in the door. Google said "we'll do one of the things you asked for because the rest of the industry was already going that way anyhow", and then refused the rest and everyone, for the moment, seems alright with this?