[Easy signin] Add method to get user info to easyUnlockPrivate

[Easy signin] Add method to get user info to easyUnlockPrivate

The method will return the user email and whether the user's logged in,
i.e. whether the app is running on signin screen.

Adds an event that's triggered when the user focused on login
screen changes.

While here, add logic to unload the app and reset signin profile
EasyUnlockService when user logs in.

Create the signin service only if enable-easy-signin switch is set.

BUG=401634
Committed: https://crrev.com/94208c2bd36b530f6bb6d1c94aec4127d9508642
Cr-Commit-Position: refs/heads/master@{#296120}

[tbarzic, 2014-09-17 22:36:34]

tbarzic@chromium.org changed reviewers:
+ xiyuan@chromium.org

[tbarzic, 2014-09-17 22:37:35]

On 2014/09/17 22:36:35, tbarzic wrote:

The cl I was talking about, I'll let you know when it's ready for review

[tbarzic, 2014-09-20 02:29:15]

ok, I think this one is more or less ready (I split some bits off to separate
cls).

I'll add missing owners on Monday

[xiyuan, 2014-09-22 17:35:33]

lgtm

https://codereview.chromium.org/576343002/diff/230001/chrome/browser/signin/e...
File chrome/browser/signin/easy_unlock_service_signin_chromeos.cc (right):

https://codereview.chromium.org/576343002/diff/230001/chrome/browser/signin/e...
chrome/browser/signin/easy_unlock_service_signin_chromeos.cc:98: StopService();
dtor is pretty late. Suggest to do this earlier in an overridden Shutdown of
KeyedService.

[tbarzic, 2014-09-22 18:54:03]

PTAL

(also, I'll have to land https://codereview.chromium.org/583403002/ before this
one)

https://codereview.chromium.org/576343002/diff/230001/chrome/browser/signin/e...
File chrome/browser/signin/easy_unlock_service_signin_chromeos.cc (right):

https://codereview.chromium.org/576343002/diff/230001/chrome/browser/signin/e...
chrome/browser/signin/easy_unlock_service_signin_chromeos.cc:98: StopService();
On 2014/09/22 17:35:33, xiyuan wrote:
> dtor is pretty late. Suggest to do this earlier in an overridden Shutdown of
> KeyedService.

Done. (added Shutdown override for service and replaced StopService method with
call to Shutdown)

[tbarzic, 2014-09-22 18:55:16]

tbarzic@chromium.org changed reviewers:
+ isherman@chromium.org, yoz@chromium.org

[tbarzic, 2014-09-22 18:55:18]

+isherman for histograms
+yoz for chrome/common/extensions/api/easy_unlock_private.idl

[Ilya Sherman, 2014-09-22 20:50:14]

histograms lgtm

[Yoyo Zhou, 2014-09-22 23:29:07]

LGTM with nits

https://codereview.chromium.org/576343002/diff/270001/chrome/common/extension...
File chrome/common/extensions/api/easy_unlock_private.idl (right):

https://codereview.chromium.org/576343002/diff/270001/chrome/common/extension...
chrome/common/extensions/api/easy_unlock_private.idl:166: // list for future use
(on signing screen there may be more than one user
is a list
signin

https://codereview.chromium.org/576343002/diff/270001/chrome/common/extension...
chrome/common/extensions/api/easy_unlock_private.idl:298: // Event dispatched
when the data for the user currently associated with
Usually we write "Fired when"

https://codereview.chromium.org/576343002/diff/270001/chrome/common/extension...
chrome/common/extensions/api/easy_unlock_private.idl:299: // Easy unlock
service.
... is updated? changes? This looks incomplete.

[tbarzic, 2014-09-22 23:43:51]

https://codereview.chromium.org/576343002/diff/270001/chrome/common/extension...
File chrome/common/extensions/api/easy_unlock_private.idl (right):

https://codereview.chromium.org/576343002/diff/270001/chrome/common/extension...
chrome/common/extensions/api/easy_unlock_private.idl:166: // list for future use
(on signing screen there may be more than one user
On 2014/09/22 23:29:06, Yoyo Zhou wrote:
> is a list
> signin

Done.

https://codereview.chromium.org/576343002/diff/270001/chrome/common/extension...
chrome/common/extensions/api/easy_unlock_private.idl:298: // Event dispatched
when the data for the user currently associated with
On 2014/09/22 23:29:07, Yoyo Zhou wrote:
> Usually we write "Fired when"

Done.

https://codereview.chromium.org/576343002/diff/270001/chrome/common/extension...
chrome/common/extensions/api/easy_unlock_private.idl:299: // Easy unlock
service.
On 2014/09/22 23:29:07, Yoyo Zhou wrote:
> ... is updated? changes? This looks incomplete.

Done.

[tbarzic, 2014-09-22 23:55:23]

The CQ bit was checked by tbarzic@chromium.org

[commit-bot: I haz the power, 2014-09-22 23:56:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/576343002/310001

[commit-bot: I haz the power, 2014-09-23 00:18:29]

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

[commit-bot: I haz the power, 2014-09-23 00:18:30]

Try jobs failed on following builders:
  win_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu/builds/64145)

[tbarzic, 2014-09-23 00:26:32]

The CQ bit was checked by tbarzic@chromium.org

[commit-bot: I haz the power, 2014-09-23 00:27:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/576343002/330001

[commit-bot: I haz the power, 2014-09-23 01:30:16]

Committed patchset #18 (id:330001) as 5d0a4756b27793cca8aaf4a0d4b3768c8ae84309

[commit-bot: I haz the power, 2014-09-23 01:30:52]

Patchset 18 (id:??) landed as
https://crrev.com/94208c2bd36b530f6bb6d1c94aec4127d9508642
Cr-Commit-Position: refs/heads/master@{#296120}