[Sync] Add support for proxy types

chrome/browser/sync/glue/virtual_data_type_controller.cc

Index: chrome/browser/sync/glue/virtual_data_type_controller.cc
diff --git a/chrome/browser/sync/glue/virtual_data_type_controller.cc b/chrome/browser/sync/glue/virtual_data_type_controller.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6c28c124f7c74358b868db94ebcdcdbb8701be0e
--- /dev/null
+++ b/chrome/browser/sync/glue/virtual_data_type_controller.cc
@@ -0,0 +1,66 @@
+// Copyright (c) 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/virtual_data_type_controller.h"
+
+namespace browser_sync {
+
+VirtualDataTypeController::VirtualDataTypeController(syncer::ModelType type)
+    : state_(NOT_RUNNING),
+      type_(type) {
+  DCHECK(syncer::VirtualTypes().Has(type_));
+}
+
+VirtualDataTypeController::~VirtualDataTypeController() {
+}
+
+void VirtualDataTypeController::LoadModels(
+    const ModelLoadCallback& model_load_callback) {
+  state_ = MODEL_LOADED;
+  model_load_callback.Run(type(), syncer::SyncError());
+}
+
+void VirtualDataTypeController::StartAssociating(
+    const StartCallback& start_callback) {
+  syncer::SyncMergeResult local_merge_result(type_);
+  syncer::SyncMergeResult syncer_merge_result(type_);
+  state_ = RUNNING;
+  start_callback.Run(DataTypeController::OK,
+                     local_merge_result,
+                     syncer_merge_result);
+}
+
+void VirtualDataTypeController::Stop() {
+  state_ = NOT_RUNNING;
+}
+
+syncer::ModelType VirtualDataTypeController::type() const {
+  DCHECK(syncer::VirtualTypes().Has(type_));
+  return type_;
+}
+
+syncer::ModelSafeGroup VirtualDataTypeController::model_safe_group() const {
+  DCHECK(syncer::VirtualTypes().Has(type_));
+  return syncer::GROUP_PASSIVE;
+}
+
+std::string VirtualDataTypeController::name() const {
+  // For logging only.
+  return syncer::ModelTypeToString(type());
+}
+
+DataTypeController::State VirtualDataTypeController::state() const {
+  return state_;
+}
+
+void VirtualDataTypeController::OnSingleDatatypeUnrecoverableError(
+    const tracked_objects::Location& from_here, const std::string& message) {
+  NOTIMPLEMENTED();
+}
+
+void VirtualDataTypeController::OnModelLoaded() {
+  NOTIMPLEMENTED();
+}
+
+}  // namespace browser_sync