I think OP is referring to Sundar's time as a CEO which started in October 2015. Crome's rise had already flattened out by then: https://www.statista.com/statistics/545520/market-share-of-i...

He pitched the creation of Chrome, but that was before he was "in charge" of Google

I think that's a rather low bar. Coming off of IE6, any browser that is advertised on the front page of Google just needs to not suck to be successful.