Massive refactoring of extensions sync code

chrome/browser/sync/glue/extension_sync_traits.cc

+// Copyright (c) 2010 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/extension_sync_traits.h"
+
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/sync/engine/syncapi.h"
+#include "chrome/browser/sync/protocol/extension_specifics.pb.h"
+
+namespace browser_sync {
+
+ExtensionSyncTraits::ExtensionSyncTraits(
+    syncable::ModelType model_type,
+    const char* root_node_tag,
+    const ExtensionTypeSet& allowed_extension_types,
+    ExtensionSpecificsGetter extension_specifics_getter,
+    ExtensionSpecificsSetter extension_specifics_setter,
+    ExtensionSpecificsEntityGetter extension_specifics_entity_getter)
+    : model_type(model_type),
+      root_node_tag(root_node_tag),
+      allowed_extension_types(allowed_extension_types),
+      extension_specifics_getter(extension_specifics_getter),
+      extension_specifics_setter(extension_specifics_setter),
+      extension_specifics_entity_getter(extension_specifics_entity_getter) {}
+
+namespace {
+
+const sync_pb::ExtensionSpecifics& GetExtensionSpecifics(
+        const sync_api::BaseNode& node) {
+  return node.GetExtensionSpecifics();
+}
+
+void SetExtensionSpecifics(
+    const sync_pb::ExtensionSpecifics& extension_specifics,
+    sync_api::WriteNode* node) {
+  node->SetTitle(UTF8ToWide(extension_specifics.name()));
+  node->SetExtensionSpecifics(extension_specifics);
+}
+
+bool GetExtensionSpecificsFromEntity(
+    const sync_pb::EntitySpecifics& entity_specifics,
+    sync_pb::ExtensionSpecifics* extension_specifics) {
+  if (!entity_specifics.HasExtension(sync_pb::extension)) {
+    return false;
+  }
+  *extension_specifics = entity_specifics.GetExtension(sync_pb::extension);
+  return true;
+}
+
+}  // namespace
+
+ExtensionSyncTraits GetExtensionSyncTraits() {
+  ExtensionTypeSet allowed_extension_types;
+  allowed_extension_types.insert(EXTENSION);
+  // We allow user scripts since some of them are actually uploaded to
+  // the gallery as extensions (!).
+  allowed_extension_types.insert(USER_SCRIPT);
+  return ExtensionSyncTraits(syncable::EXTENSIONS,
+                             "google_chrome_extensions",
+                             allowed_extension_types,
+                             &GetExtensionSpecifics,
+                             &SetExtensionSpecifics,
+                             &GetExtensionSpecificsFromEntity);
+}
+
+}  // namespace browser_sync