That's because everything is growing in China, including probably Android and Chromebooks. Google just had the guts to do the right thing.
There are no google services in china, so it's definitely an easier stand to take for Google than for its competitors doing business there.
When the Chinese government demanded to be able to sniff all traffic, Google fought back, refused to play cozy enough with the government, and gave up its chance at a foothold.
There's a whole wiki article on this mess: https://en.wikipedia.org/wiki/Google_China#Ending_of_self-ce...