Refactor syncable DEVICE_INFO type from ChangeProcessor to SyncableService - part 3.

This change integrates DeviceIfoSyncService and DeviceInfoDataTypeController introduced in an early change
with the rest of the Sync code and removes the old implementation of DEVICE_INFO sync type based on SyncedDeviceTracker.
As a part of this change DEVICE_INFO stops being a specially implemented control type and becomes a priority type
with implementation that follows pattern of the majority of other sync types.
This should help to do some further refactoring including decoupling of DeviceInfo sync code from the browser and moving it to sync_driver component.
This change also adds support for syncing of local device backup timestamp to DeviceInfoSyncService. This functionality was missing when DeviceInfoSyncService was initially introduced.

BUG=395349

Review URL: https://codereview.chromium.org/566623003

Cr-Commit-Position: refs/heads/master@{#295992}

1 files changed, 1 insertions, 0 deletions

diff --git a/components/sync_driver/pref_names.cc b/components/sync_driver/pref_names.cc
index d1568bc..5ecf5c8 100644
--- a/components/sync_driver/pref_names.cc
+++ b/components/sync_driver/pref_names.cc
@@ -38,6 +38,7 @@ const char kSyncArticles[] = "sync.articles";
 const char kSyncAutofillProfile[] = "sync.autofill_profile";
 const char kSyncAutofill[] = "sync.autofill";
 const char kSyncBookmarks[] = "sync.bookmarks";
+const char kSyncDeviceInfo[] = "sync.device_info";
 const char kSyncDictionary[] = "sync.dictionary";
 const char kSyncExtensionSettings[] = "sync.extension_settings";
 const char kSyncExtensions[] = "sync.extensions";