> All phones comes preloaded with Google Chrome
That's not true. There's still a fair bit of Android Browser out there - it's up to the OEM whether they ship Chrome or their own customised version of Android Browser.
> (apart from sending your every keystroke to the mothership)
I don't believe you. Here's the source, show me where it does this: https://chromium.googlesource.com/chromium/src.git
Here's the privacy policy, which explains what it actually sends: https://www.google.co.uk/chrome/browser/privacy/
(Perhaps you're thinking of the instant search feature? That's quite a long way from "every keystroke", and the page above explains how to turn it off if you don't like it.)