Revert "Revert "Stop Travis from uploading docs""
Revert "Revert "Stop Travis from uploading docs""

This patch again stops Traivs from uploading docs now that the new infra seems
to be better at it.

This reverts commit 196c881c5bb17dd554284a08b692c037c70c7908.

Hixie/flutter,Hixie/flutter,aghassemi/flutter,Hixie/flutter,Hixie/flutter,cbracken/flutter,flutter/flutter,cbracken/flutter,cbracken/flutter,turnidge/flutter,turnidge/flutter,turnidge/flutter,flutter/flutter,tvolkert/flutter,Hixie/flutter,cbracken/flutter,Hixie/flutter,flutter/flutter,tvolkert/flutter,tvolkert/flutter,aghassemi/flutter,aghassemi/flutter,Hixie/flutter,cbracken/flutter,flutter/flutter,flutter/flutter,flutter/flutter,tvolkert/flutter,flutter/flutter,tvolkert/flutter,tvolkert/flutter,tvolkert/flutter,Hixie/flutter,cbracken/flutter,cbracken/flutter,tvolkert/flutter,cbracken/flutter,Hixie/flutter,flutter/flutter,tvolkert/flutter,flutter/flutter,Hixie/flutter,turnidge/flutter,aghassemi/flutter,cbracken/flutter,turnidge/flutter,tvolkert/flutter,flutter/flutter,cbracken/flutter