Fix implicit conversion of scoped_refptr<T> to T* in PasswordStoreWin.

Fix implicit conversion of scoped_refptr<T> to T* in PasswordStoreWin.

Since PasswordStoreWin::DBHandler ends up retaining a reference,
indicate this by passing a scoped_refptr<PasswordWebDataService>.

BUG=110610
Committed: https://crrev.com/edf0e997843feaed395372eb8fcef402c1bebf18
Cr-Commit-Position: refs/heads/master@{#305367}

[dcheng, 2014-11-22 05:45:57]

dcheng@chromium.org changed reviewers:
+ thestig@chromium.org

[Lei Zhang, 2014-11-22 06:16:19]

lgtm

[dcheng, 2014-11-22 06:17:43]

The CQ bit was checked by dcheng@chromium.org

[commit-bot: I haz the power, 2014-11-22 06:18:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/751813002/1

[commit-bot: I haz the power, 2014-11-22 07:30:11]

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

[commit-bot: I haz the power, 2014-11-22 07:30:12]

Try jobs failed on following builders:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[dcheng, 2014-11-22 07:37:27]

The CQ bit was checked by dcheng@chromium.org

[commit-bot: I haz the power, 2014-11-22 07:38:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/751813002/1

[commit-bot: I haz the power, 2014-11-22 08:49:48]

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

[commit-bot: I haz the power, 2014-11-22 08:49:49]

Try jobs failed on following builders:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[dcheng, 2014-11-22 17:39:23]

The CQ bit was checked by dcheng@chromium.org

[commit-bot: I haz the power, 2014-11-22 17:40:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/751813002/1

[commit-bot: I haz the power, 2014-11-22 18:14:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-22 18:14:50]

Patchset 1 (id:??) landed as
https://crrev.com/edf0e997843feaed395372eb8fcef402c1bebf18
Cr-Commit-Position: refs/heads/master@{#305367}