Add class PreloadAddressValidator, interface to libaddressinput.

Add class PreloadAddressValidator, interface to libaddressinput.

PreloadAddressValidator implements the same interface as Chromium's
current AddressValidator but calls libaddressinput AddressValidator to
perform the actual work, to simplify switching Chromium Autofill over to
using libaddressinput. All existing test cases are ported.

The suggestions functionality is currently stubbed out.

R=rouslan@chromium.org
BUG=

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=274507

[please use gerrit instead, 2014-06-02 17:39:04]

LGTM.

[please use gerrit instead, 2014-06-02 17:39:07]

The CQ bit was checked by rouslan@chromium.org

[commit-bot: I haz the power, 2014-06-02 17:41:11]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/roubert@google.com/292313008/110001

[commit-bot: I haz the power, 2014-06-02 19:46:31]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[commit-bot: I haz the power, 2014-06-02 19:48:19]

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

[commit-bot: I haz the power, 2014-06-02 19:48:20]

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...)

[please use gerrit instead, 2014-06-02 20:16:18]

The CQ bit was checked by rouslan@chromium.org

[commit-bot: I haz the power, 2014-06-02 20:18:24]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/roubert@google.com/292313008/110001

[commit-bot: I haz the power, 2014-06-02 20:21:49]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[commit-bot: I haz the power, 2014-06-02 20:24:05]

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

[commit-bot: I haz the power, 2014-06-02 20:24:06]

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...)

[roubert, 2014-06-03 08:18:11]

The CQ bit was checked by roubert@google.com

[commit-bot: I haz the power, 2014-06-03 08:19:59]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/roubert@google.com/292313008/110001

[roubert, 2014-06-03 08:20:41]

The CQ bit was checked by roubert@google.com

[commit-bot: I haz the power, 2014-06-03 08:21:46]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/roubert@google.com/292313008/110001

[commit-bot: I haz the power, 2014-06-03 13:27:44]

Change committed as 274507