Add Google account login to the existing login flow. ## Development tasks ### Features - [x] Email screen - [x] add Google button - [x] Google auth flow - [ ] third party auth backup screen - [x] Email found - [x] first use password screen (#7918) - [x] Email not found - [x] prepopulate email on signup tap (#8021) - [x] Error (#7887) - _Same subtasks as above_ - [x] Support 2FA (#8010) - [x] New analytics specific to Google login (#8028) ### Other issues - [x] Touch state handling for Google button (#8017) - [x] Crash when dismissing Google VC with `Done` (#8012) - [x] Google button placement overtop error label (#7902) - [x] Spinner: should start immediately when Google tapped, stop by the time error option returns (#8022) - [ ] Limit 2FA code to numbers - [x] Improve/review error shown when no matching wpcom account is found (#8022) ## Mockup [](https://user-images.githubusercontent.com/517257/29625427-e53f8984-87e8-11e7-988c-e7913d575e63.png)
Add Google account login to the existing login flow.
Development tasks
Features
Other issues
Done(Login: fix crash when dismissing Google view #8012)Mockup