This newly carved out module has 0 external dependencies which should
help simiplify many peoples dep trees.

Change-Id: I59fcc8517b92fea0142fdee1be12076c4ece3e61
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/446075
Auto-Submit: Cody Oss <codyoss@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Cody Oss <codyoss@google.com>

Update golang.org/x dependencies to their latest tagged versions.
Once this CL is submitted, and post-submit testing succeeds on all
first-class ports across all supported Go versions, this repository
will be tagged with its next minor version.

Change-Id: I3f0d7b406644af66ea5bef4e6edbe60044b96274
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/448756
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Jenny Rakoczy <jenny@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Run-TryBot: Gopher Robot <gobot@golang.org>
Auto-Submit: Gopher Robot <gobot@golang.org>

Change-Id: I4d664862b7b287131c1481b238ebd0875f7c233b
GitHub-Last-Rev: 74bcc33
GitHub-Pull-Request: #608
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/449975
Run-TryBot: Cody Oss <codyoss@google.com>
Auto-Submit: Cody Oss <codyoss@google.com>
Reviewed-by: Leo Siracusa <leosiracusa@google.com>
Reviewed-by: Cody Oss <codyoss@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>

…ity credential environment variables before aws metadata call

Adds check for aws values in environment variables before the metadata server is called to prevent unnecessary off box calls. See googleapis/google-auth-library-java#1100 for same change in java library.

Change-Id: Ie86a899be88c38d3fcbbe377f9bf30a7a66530c0
GitHub-Last-Rev: bcab695
GitHub-Pull-Request: #612
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/453715
Reviewed-by: Leo Siracusa <leosiracusa@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Cody Oss <codyoss@google.com>
Auto-Submit: Cody Oss <codyoss@google.com>
Reviewed-by: Cody Oss <codyoss@google.com>

Update golang.org/x dependencies to their latest tagged versions.
Once this CL is submitted, and post-submit testing succeeds on all
first-class ports across all supported Go versions, this repository
will be tagged with its next minor version.

Change-Id: Iddd5948b1dc74c208372e82df1971f9cd2b5f296
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/455435
Run-TryBot: Gopher Robot <gobot@golang.org>
Auto-Submit: Gopher Robot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>

Update golang.org/x dependencies to their latest tagged versions.
Once this CL is submitted, and post-submit testing succeeds on all
first-class ports across all supported Go versions, this repository
will be tagged with its next minor version.

Change-Id: Ic017d7ac9986ab17999bbf9a9528e5671946e57a
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/460501
Reviewed-by: Heschi Kreinick <heschi@google.com>
Run-TryBot: Gopher Robot <gobot@golang.org>
Auto-Submit: Gopher Robot <gobot@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>