Revert of Add a mock class for DiskMountManagerObserver. disk_mount_manager_observer_unittests.

Revert of Add a mock class for DiskMountManagerObserver. disk_mount_manager_observer_unittests. (patchset #4 id:60001 of https://codereview.chromium.org/2333983004/ )

Reason for revert:
Asan failure

Original issue's description:
> Refactor disk_mount_manager_unittest by replacing gmock with a dedicated mock class of DiskMountManagerObserver.
>
> This change is based on
> https://codereview.chromium.org/2292473002/
> which was once merged but reverted by
> https://codereview.chromium.org/2340433002/
>
> BUG=641943
>
> Committed: https://crrev.com/a07c4fb1ece6ee6c6a2170825208b1f873012a0a
> Cr-Commit-Position: refs/heads/master@{#418478}

TBR=satorux@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=641943
Committed: https://crrev.com/48ec0aa3ee5b7ab7efe7738cd03b243bd5874c62
Cr-Commit-Position: refs/heads/master@{#418520}

[yamaguchi, 2016-09-14 09:51:21]

The CQ bit was checked by yamaguchi@chromium.org

[yamaguchi, 2016-09-14 09:51:22]

Created Revert of Add a mock class for DiskMountManagerObserver.
disk_mount_manager_observer_unittests.

[commit-bot: I haz the power, 2016-09-14 09:51:38]

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, 2016-09-14 09:51:38]

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

[commit-bot: I haz the power, 2016-09-14 09:51:39]

No L-G-T-M from a valid reviewer yet. 
CQ run can only be started by full committers or once the patch has
received an L-G-T-M from a full committer.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[Yuta Kitamura, 2016-09-14 09:58:31]

The CQ bit was checked by yutak@chromium.org

[commit-bot: I haz the power, 2016-09-14 09:58:45]

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

[Yuta Kitamura, 2016-09-14 09:58:45]

LGTM

[commit-bot: I haz the power, 2016-09-14 09:58:46]

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

[commit-bot: I haz the power, 2016-09-14 09:58:46]

No L-G-T-M from a valid reviewer yet. 
CQ run can only be started by full committers or once the patch has
received an L-G-T-M from a full committer.
Even if an L-G-T-M may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[Yuta Kitamura, 2016-09-14 10:00:09]

The CQ bit was checked by yutak@chromium.org

[commit-bot: I haz the power, 2016-09-14 10:00:19]

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, 2016-09-14 10:01:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-14 10:03:54]

Description was changed from

==========
Revert of Add a mock class for DiskMountManagerObserver.
disk_mount_manager_observer_unittests. (patchset #4 id:60001 of
https://codereview.chromium.org/2333983004/ )

Reason for revert:
Asan failure

Original issue's description:
> Refactor disk_mount_manager_unittest by replacing gmock with a dedicated mock
class of DiskMountManagerObserver.
> 
> This change is based on
> https://codereview.chromium.org/2292473002/
> which was once merged but reverted by
> https://codereview.chromium.org/2340433002/
> 
> BUG=641943
> 
> Committed: https://crrev.com/a07c4fb1ece6ee6c6a2170825208b1f873012a0a
> Cr-Commit-Position: refs/heads/master@{#418478}

TBR=satorux@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=641943
==========

to

==========
Revert of Add a mock class for DiskMountManagerObserver.
disk_mount_manager_observer_unittests. (patchset #4 id:60001 of
https://codereview.chromium.org/2333983004/ )

Reason for revert:
Asan failure

Original issue's description:
> Refactor disk_mount_manager_unittest by replacing gmock with a dedicated mock
class of DiskMountManagerObserver.
>
> This change is based on
> https://codereview.chromium.org/2292473002/
> which was once merged but reverted by
> https://codereview.chromium.org/2340433002/
>
> BUG=641943
>
> Committed: https://crrev.com/a07c4fb1ece6ee6c6a2170825208b1f873012a0a
> Cr-Commit-Position: refs/heads/master@{#418478}

TBR=satorux@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=641943

Committed: https://crrev.com/48ec0aa3ee5b7ab7efe7738cd03b243bd5874c62
Cr-Commit-Position: refs/heads/master@{#418520}
==========

[commit-bot: I haz the power, 2016-09-14 10:03:55]

Patchset 1 (id:??) landed as
https://crrev.com/48ec0aa3ee5b7ab7efe7738cd03b243bd5874c62
Cr-Commit-Position: refs/heads/master@{#418520}