[GCM] Adding GCMAccountMapper tests

[GCM] Adding GCMAccountMapper tests

1) When the status is ADDING (adding message is sent), the token is refreshed.
2) When the status is REMOVING (removing message is sent), the token is added
again.
3) updating multiple account mappings

BUG=374969
R=jianli@chromium.org

Committed: https://crrev.com/0df37a7cb82558acdbeca5ba4bd3020331ad1c85
Cr-Commit-Position: refs/heads/master@{#293744}

[fgorski, 2014-09-05 21:42:19]

I've added tests that were missing in the big patch.
PTAL

[jianli, 2014-09-05 22:52:01]

lgtm

https://codereview.chromium.org/544363002/diff/1/components/gcm_driver/gcm_ac...
File components/gcm_driver/gcm_account_mapper_unittest.cc (right):

https://codereview.chromium.org/544363002/diff/1/components/gcm_driver/gcm_ac...
components/gcm_driver/gcm_account_mapper_unittest.cc:1: // Use of this source
code is governed by a BSD-style license that can be
?

https://codereview.chromium.org/544363002/diff/1/components/gcm_driver/gcm_ac...
components/gcm_driver/gcm_account_mapper_unittest.cc:93: LastMessageAction
last_action_;
This variable needs to be initialized.

[fgorski, 2014-09-05 23:25:00]

The CQ bit was checked by fgorski@chromium.org

[commit-bot: I haz the power, 2014-09-05 23:27:44]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/fgorski@chromium.org/544363002/20001

[commit-bot: I haz the power, 2014-09-06 05:29:36]

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

[commit-bot: I haz the power, 2014-09-06 05:29:37]

Exceeded time limit waiting for builds to trigger.

[fgorski, 2014-09-08 16:41:23]

The CQ bit was checked by fgorski@chromium.org

[commit-bot: I haz the power, 2014-09-08 16:44:21]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/fgorski@chromium.org/544363002/20001

[commit-bot: I haz the power, 2014-09-08 16:57:39]

Committed patchset #2 (id:20001) as a15249de25304c0d2173029bc22b2f136adac537

[Noel Gordon, 2014-09-09 00:49:55]

A revert of this CL (patchset #2 id:20001) has been created in
https://codereview.chromium.org/554153003/ by noel@chromium.org.

The reason for reverting is: GCMAccountMapperTest.MultipleAccountMappings is
failing on Win7 Debug.

http://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%28....

[commit-bot: I haz the power, 2014-09-10 03:46:52]

Patchset 2 (id:??) landed as
https://crrev.com/0df37a7cb82558acdbeca5ba4bd3020331ad1c85
Cr-Commit-Position: refs/heads/master@{#293744}