[Sync] Have SBH tell SyncManager which types to purge

sync/internal_api/public/test/fake_sync_manager.h

Index: sync/internal_api/public/test/fake_sync_manager.h
diff --git a/sync/internal_api/public/test/fake_sync_manager.h b/sync/internal_api/public/test/fake_sync_manager.h
index e4cb09fda6be305ff138bbe8586a64fc12e7e32f..e18e2d8c5a1274debaec636bf188759bba817c28 100644
--- a/sync/internal_api/public/test/fake_sync_manager.h
+++ b/sync/internal_api/public/test/fake_sync_manager.h
@@ -115,9 +115,9 @@ class FakeSyncManager : public SyncManager {
   virtual void ConfigureSyncer(
       ConfigureReason reason,
       ModelTypeSet to_download,
+      ModelTypeSet to_purge,
       ModelTypeSet to_journal,
       ModelTypeSet to_unapply,
-      ModelTypeSet to_ignore,
       const ModelSafeRoutingInfo& new_routing_info,
       const base::Closure& ready_task,
       const base::Closure& retry_task) OVERRIDE;