> and that Google mandates the browser be Chrome and the search be Google for all Chrome web browsers (largest desktop market share) and Android devices (largest mobile market share)
No, they don't. You're free to use any browser on your desktop. You're free to use any browser on your Android device. And you're free to go into Chrome settings and use any search engine in Chrome on any of these devices.
In my part of the world (Europe) there has been a kind of triple point in March 2012 http://gs.statcounter.com/#browser-eu-monthly-200807-201504 Chrome and FF overtook IE, then Chrome kept growing, FF and IE kept falling with FF maintaining an edge over IE.
No, they don't. You're free to use any browser on your desktop. You're free to use any browser on your Android device. And you're free to go into Chrome settings and use any search engine in Chrome on any of these devices.