tree 8757b0bead4dd7193c6ffb18513262fa2e1d2a16
parent e5909d4679a1926c774c712b343f10b8298687a3
author Brad Fitzpatrick <bradfitz@golang.org> 1419974701 -0800
committer Brad Fitzpatrick <bradfitz@golang.org> 1419978450 +0000

oauth2, oauth2/google: add, use ReuseTokenSource

Token caching is now done whenever you make a Client, and
ReuseTokenSource is exported from the oauth2 package and used by the
Google TokenSources (Compute and App Engine).

Token.Expired is now Token.Valid, and works on nil receivers.

Some other wording cleanups in the process.

All tests pass. App Engine should pass, but is untested.

Change-Id: Ibe1d2599ac3ccfe9b399b1672f74bb24cfc8d311
Reviewed-on: https://go-review.googlesource.com/2195
Reviewed-by: Burcu Dogan <jbd@google.com>