Move impl of identity.GetAuthToken() extension API to its own file

Move impl of identity.GetAuthToken() extension API to its own file

As a precursor to a refactoring of the identity extension API implementation
to use the Identity Service, I am moving the implementations of the six
identity extension API functions to their own files, rather than all
being lumped together in identity_api.*. This will make it easier to
analyze each of these function implementations independently and
incrementally convert them to use the Identity Service.

BUG=685654
Review-Url: https://codereview.chromium.org/2668203004
Cr-Commit-Position: refs/heads/master@{#447981}
Committed: https://chromium.googlesource.com/chromium/src/+/e1b2ceb34172034512c26b014f8c2e4900187171

[blundell, 2017-02-01 19:53:17]

The CQ bit was checked by blundell@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-02-01 19:53:46]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-01 21:05:58]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-02-01 21:05:59]

Dry run: This issue passed the CQ dry run.

[blundell, 2017-02-02 08:26:48]

blundell@chromium.org changed reviewers:
+ rockot@chromium.org

[Ken Rockot(use gerrit already), 2017-02-02 15:19:28]

lgtm

[blundell, 2017-02-03 09:52:27]

The CQ bit was checked by blundell@chromium.org

[commit-bot: I haz the power, 2017-02-03 09:52:43]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-03 13:03:21]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1486115547945300, "parent_rev":
"49e97227eb3b54d9721c27a37a162dc84355d13f", "commit_rev":
"e1b2ceb34172034512c26b014f8c2e4900187171"}

[commit-bot: I haz the power, 2017-02-03 13:03:51]

Description was changed from

==========
Move impl of identity.GetAuthToken() extension API to its own file

As a precursor to a refactoring of the identity extension API implementation
to use the Identity Service, I am moving the implementations of the six
identity extension API functions to their own files, rather than all
being lumped together in identity_api.*. This will make it easier to
analyze each of these function implementations independently and
incrementally convert them to use the Identity Service.

BUG=685654
==========

to

==========
Move impl of identity.GetAuthToken() extension API to its own file

As a precursor to a refactoring of the identity extension API implementation
to use the Identity Service, I am moving the implementations of the six
identity extension API functions to their own files, rather than all
being lumped together in identity_api.*. This will make it easier to
analyze each of these function implementations independently and
incrementally convert them to use the Identity Service.

BUG=685654

Review-Url: https://codereview.chromium.org/2668203004
Cr-Commit-Position: refs/heads/master@{#447981}
Committed:
https://chromium.googlesource.com/chromium/src/+/e1b2ceb34172034512c26b014f8c...
==========

[commit-bot: I haz the power, 2017-02-03 13:03:52]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/e1b2ceb34172034512c26b014f8c...