> Google started, developed, and built Chrome

This is perhaps a tad ahistorical. Google forked Blink off from WebKit around 2013 - it owes a lot of it's early success to the same technical foundations as Safari (which in turns owes the same debt to Konqueror...)

That's the rendering engine, which was one part of their early success; the other part was the V8 Javascript engine which was miles ahead of the competition in terms of performance.