[sync] Add backup time in synced device info so that server can flag device

chrome/browser/sync/glue/synced_device_tracker.cc

Index: chrome/browser/sync/glue/synced_device_tracker.cc
diff --git a/chrome/browser/sync/glue/synced_device_tracker.cc b/chrome/browser/sync/glue/synced_device_tracker.cc
index bf7fa9274fc78f9303bb4dd184b690e32702f28f..e77463e3d7df6f0ef7cf986f938852531e5df118 100644
--- a/chrome/browser/sync/glue/synced_device_tracker.cc
+++ b/chrome/browser/sync/glue/synced_device_tracker.cc
@@ -13,6 +13,7 @@
 #include "sync/internal_api/public/user_share.h"
 #include "sync/internal_api/public/write_node.h"
 #include "sync/internal_api/public/write_transaction.h"
+#include "sync/util/time.h"
 
 namespace browser_sync {
 
@@ -157,25 +158,28 @@ void SyncedDeviceTracker::InitLocalDeviceInfoContinuation(
 }
 
 void SyncedDeviceTracker::WriteLocalDeviceInfo(const DeviceInfo& info) {
-  sync_pb::DeviceInfoSpecifics specifics;
   DCHECK_EQ(cache_guid_, info.guid());
-  specifics.set_cache_guid(cache_guid_);
-  specifics.set_client_name(info.client_name());
-  specifics.set_chrome_version(info.chrome_version());
-  specifics.set_sync_user_agent(info.sync_user_agent());
-  specifics.set_device_type(info.device_type());
-
-  WriteDeviceInfo(specifics, local_device_info_tag_);
+  WriteDeviceInfo(info, local_device_info_tag_);
 }
 
-void SyncedDeviceTracker::WriteDeviceInfo(
-    const sync_pb::DeviceInfoSpecifics& specifics,
-    const std::string& tag) {
+void SyncedDeviceTracker::WriteDeviceInfo(const DeviceInfo& info,
+                                          const std::string& tag) {
   syncer::WriteTransaction trans(FROM_HERE, user_share_);
   syncer::WriteNode node(&trans);
 
+  sync_pb::DeviceInfoSpecifics specifics;
+  specifics.set_cache_guid(info.guid());
+  specifics.set_client_name(info.client_name());
+  specifics.set_chrome_version(info.chrome_version());
+  specifics.set_sync_user_agent(info.sync_user_agent());
+  specifics.set_device_type(info.device_type());
+
   if (node.InitByClientTagLookup(syncer::DEVICE_INFO, tag) ==
       syncer::BaseNode::INIT_OK) {
+    const sync_pb::DeviceInfoSpecifics& sync_specifics =
+        node.GetDeviceInfoSpecifics();
+    if (sync_specifics.has_backup_timestamp())
+      specifics.set_backup_timestamp(sync_specifics.backup_timestamp());
     node.SetDeviceInfoSpecifics(specifics);
     node.SetTitle(specifics.client_name());
   } else {
@@ -195,4 +199,33 @@ void SyncedDeviceTracker::WriteDeviceInfo(
   }
 }
 
+void SyncedDeviceTracker::UpdateLocalDeviceBackupTime(base::Time backup_time) {
+  syncer::WriteTransaction trans(FROM_HERE, user_share_);
+  syncer::WriteNode node(&trans);
+
+  if (node.InitByClientTagLookup(syncer::DEVICE_INFO, local_device_info_tag_)
+          == syncer::BaseNode::INIT_OK) {
+    sync_pb::DeviceInfoSpecifics specifics = node.GetDeviceInfoSpecifics();
+    int64 new_backup_timestamp = syncer::TimeToProtoTime(backup_time);
+    if (!specifics.has_backup_timestamp() ||
+        specifics.backup_timestamp() != new_backup_timestamp) {
+      specifics.set_backup_timestamp(new_backup_timestamp);
+      node.SetDeviceInfoSpecifics(specifics);
+    }
+  }
+}
+
+base::Time SyncedDeviceTracker::GetLocalDeviceBackupTime() const {
+  syncer::ReadTransaction trans(FROM_HERE, user_share_);
+  syncer::ReadNode node(&trans);
+  if (node.InitByClientTagLookup(syncer::DEVICE_INFO, local_device_info_tag_)
+          == syncer::BaseNode::INIT_OK &&
+      node.GetDeviceInfoSpecifics().has_backup_timestamp()) {
+    return syncer::ProtoTimeToTime(
+        node.GetDeviceInfoSpecifics().backup_timestamp());
+  } else {
+    return base::Time();
+  }
+}
+
 }  // namespace browser_sync