[USS] Move GetAllNodes from backend to controller

components/sync/driver/glue/sync_backend_host_core.cc

Index: components/sync/driver/glue/sync_backend_host_core.cc
diff --git a/components/sync/driver/glue/sync_backend_host_core.cc b/components/sync/driver/glue/sync_backend_host_core.cc
index 184c2afe3b1bbda9fa6b69b3a4bda615638f0b08..6bf962a14e09b3ff6231476bc48b148181364e20 100644
--- a/components/sync/driver/glue/sync_backend_host_core.cc
+++ b/components/sync/driver/glue/sync_backend_host_core.cc
@@ -662,32 +662,6 @@ void SyncBackendHostCore::DeleteSyncDataFolder() {
   }
 }
 
-void SyncBackendHostCore::GetAllNodesForTypes(
-    syncer::ModelTypeSet types,
-    scoped_refptr<base::SequencedTaskRunner> task_runner,
-    base::Callback<void(const std::vector<syncer::ModelType>& type,
-                        std::vector<std::unique_ptr<base::ListValue>>)>
-        callback) {
-  std::vector<syncer::ModelType> types_vector;
-  std::vector<std::unique_ptr<base::ListValue>> node_lists;
-
-  syncer::ModelSafeRoutingInfo routes;
-  registrar_->GetModelSafeRoutingInfo(&routes);
-  syncer::ModelTypeSet enabled_types = GetRoutingInfoTypes(routes);
-
-  for (syncer::ModelTypeSet::Iterator it = types.First(); it.Good(); it.Inc()) {
-    types_vector.push_back(it.Get());
-    if (!enabled_types.Has(it.Get())) {
-      node_lists.push_back(base::MakeUnique<base::ListValue>());
-    } else {
-      node_lists.push_back(sync_manager_->GetAllNodesForType(it.Get()));
-    }
-  }
-
-  task_runner->PostTask(
-      FROM_HERE, base::Bind(callback, types_vector, base::Passed(&node_lists)));
-}
-
 void SyncBackendHostCore::StartSavingChanges() {
   // We may already be shut down.
   if (!sync_loop_)