[Sync] Convert sync to a static library.

[Sync] Convert sync to a static library.

In preparation for merging in sync_driver, sync is becoming a static
library. The driver code has several static_library dependencies that it
would probably be bad to duplicate and at least one class
(DeviceCountMetricsProvider) which would otherwise need to export a base
class from an unrelated component.

BUG=633709
Committed: https://crrev.com/35515f47c042be06961058acf4f9eab9a92bab16
Cr-Commit-Position: refs/heads/master@{#411851}

[maxbogue, 2016-08-11 18:21:05]

The CQ bit was checked by maxbogue@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-08-11 18:21:46]

Dry run: 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, 2016-08-11 18:41:07]

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

[commit-bot: I haz the power, 2016-08-11 18:41:08]

Dry run: Try jobs failed on following builders:
  ios-device on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-device/builds...)

[maxbogue, 2016-08-11 20:49:46]

The CQ bit was checked by maxbogue@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-08-11 20:51:20]

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

[maxbogue, 2016-08-11 21:31:55]

maxbogue@chromium.org changed reviewers:
+ pavely@chromium.org

[maxbogue, 2016-08-11 21:31:57]

Pavel, PTAL! Especially note the three BUILD.gn changes. I wasn't sure of
whether to change //components/sync/protocol to static_library or not; I'm not
sure why it was shared.

[commit-bot: I haz the power, 2016-08-11 23:49:49]

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

[commit-bot: I haz the power, 2016-08-11 23:49:51]

Dry run: This issue passed the CQ dry run.

[pavely, 2016-08-12 23:16:09]

lgtm

[maxbogue, 2016-08-13 00:45:40]

The CQ bit was checked by maxbogue@chromium.org

[commit-bot: I haz the power, 2016-08-13 00:46:10]

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, 2016-08-13 01:55:47]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-08-13 02:00:58]

Description was changed from

==========
[Sync] Convert sync to a static library.

In preparation for merging in sync_driver, sync is becoming a static
library. The driver code has several static_library dependencies that it
would probably be bad to duplicate and at least one class
(DeviceCountMetricsProvider) which would otherwise need to export a base
class from an unrelated component.

BUG=633709
==========

to

==========
[Sync] Convert sync to a static library.

In preparation for merging in sync_driver, sync is becoming a static
library. The driver code has several static_library dependencies that it
would probably be bad to duplicate and at least one class
(DeviceCountMetricsProvider) which would otherwise need to export a base
class from an unrelated component.

BUG=633709

Committed: https://crrev.com/35515f47c042be06961058acf4f9eab9a92bab16
Cr-Commit-Position: refs/heads/master@{#411851}
==========

[commit-bot: I haz the power, 2016-08-13 02:00:59]

Patchset 2 (id:??) landed as
https://crrev.com/35515f47c042be06961058acf4f9eab9a92bab16
Cr-Commit-Position: refs/heads/master@{#411851}