I think Google will have a tough year as a business and, as you say, they cannot expect exponential growth every year. Their share price has already been affected - it’s down 20% on this time last year.
As for Chrome, it’s not really a revenue-raising product. It helps indirectly but, again, usage is growing at a slower rate and I don’t think it’ll ever reach the IE-like 95%.
I’m not sure I agree that devs should squeeze more out of frameworks. Part of the problem is that overblown frameworks are adopted for relatively simple projects. Smaller, more focused libraries would benefit.