[Sync] Have configuration specify which datatypes are ready to sync

chrome/browser/sync/glue/sync_backend_host_mock.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync/glue/sync_backend_host_mock.h"
 
 #include "components/sync_driver/sync_frontend.h"
 
 namespace browser_sync {
 
@@ skipping 37 matching lines @@
 
 void SyncBackendHostMock::StopSyncingForShutdown() {}
 
 scoped_ptr<base::Thread> SyncBackendHostMock::Shutdown(
     syncer::ShutdownReason reason) {
   return scoped_ptr<base::Thread>();
 }
 
 void SyncBackendHostMock::UnregisterInvalidationIds() {}
 
-void SyncBackendHostMock::ConfigureDataTypes(
+syncer::ModelTypeSet SyncBackendHostMock::ConfigureDataTypes(
     syncer::ConfigureReason reason,
     const DataTypeConfigStateMap& config_state_map,
-    const base::Callback<void(syncer::ModelTypeSet,
-                              syncer::ModelTypeSet)>& ready_task,
-    const base::Callback<void()>& retry_callback) {}
+    const base::Callback<void(syncer::ModelTypeSet, syncer::ModelTypeSet)>&
+        ready_task,
+    const base::Callback<void()>& retry_callback) {
+  return syncer::ModelTypeSet();
+}
 
 void SyncBackendHostMock::EnableEncryptEverything() {}
 
 void SyncBackendHostMock::ActivateDataType(
     syncer::ModelType type, syncer::ModelSafeGroup group,
     sync_driver::ChangeProcessor* change_processor) {}
 void SyncBackendHostMock::DeactivateDataType(syncer::ModelType type) {}
 
 syncer::UserShare* SyncBackendHostMock::GetUserShare() const {
   return NULL;
@@ skipping 55 matching lines @@
     syncer::ModelTypeSet types,
     base::Callback<void(const std::vector<syncer::ModelType>& type,
                         ScopedVector<base::ListValue>) > callback) {}
 
 void SyncBackendHostMock::set_fail_initial_download(bool should_fail) {
   fail_initial_download_ = should_fail;
 }
 
 }  // namespace browser_sync