Use a different message on the first reload. (#9418)
Use a different message on the first reload. (#9418)

The first hot reload does a bunch of work that we used to hide behind the
loader screen. This PR changes the messsage printed to the user on the first
reload from:

'Performing hot reload...'

to:

'Initializing hot reload...'

Subsequent reloads say 'Performing hot reload...'
Hixie/flutter,flutter/flutter,Hixie/flutter,tvolkert/flutter,turnidge/flutter,flutter/flutter,flutter/flutter,Hixie/flutter,cbracken/flutter,tvolkert/flutter,turnidge/flutter,tvolkert/flutter,cbracken/flutter,flutter/flutter,tvolkert/flutter,turnidge/flutter,flutter/flutter,cbracken/flutter,cbracken/flutter,cbracken/flutter,turnidge/flutter,flutter/flutter,Hixie/flutter,Hixie/flutter,tvolkert/flutter,flutter/flutter,flutter/flutter,Hixie/flutter,tvolkert/flutter,cbracken/flutter,flutter/flutter,cbracken/flutter,tvolkert/flutter,cbracken/flutter,Hixie/flutter,flutter/flutter,tvolkert/flutter,Hixie/flutter,cbracken/flutter,Hixie/flutter,tvolkert/flutter,turnidge/flutter,tvolkert/flutter,cbracken/flutter,Hixie/flutter