WORK IN PROGRESS.

chrome/browser/extensions/extension_settings_sync_data.cc

+// Copyright (c) 2011 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/extensions/extension_settings_sync_data.h"
+
+#include "base/json/json_reader.h"
+#include "base/json/json_writer.h"
+#include "chrome/browser/sync/protocol/extension_setting_specifics.pb.h"
+
+ExtensionSettingsSyncData::ExtensionSettingsSyncData(
+    const SyncChange& sync_change) {
+  *this = ExtensionSettingsSyncData(sync_change.sync_data());
+  internal_->change_type_ = sync_change.change_type();
+}
+
+ExtensionSettingsSyncData::ExtensionSettingsSyncData(
+    const SyncData& sync_data) {
+  sync_pb::ExtensionSettingSpecifics specifics =
+      sync_data.GetSpecifics().GetExtension(sync_pb::extension_setting);
+  *this = ExtensionSettingsSyncData(
+      SyncChange::ACTION_INVALID,
+      specifics.extension_id(),
+      specifics.key(),
+      base::JSONReader().JsonToValue(specifics.value(), false, false));
+}
+
+ExtensionSettingsSyncData::ExtensionSettingsSyncData(
+    SyncChange::SyncChangeType change_type,
+    const std::string& extension_id,
+    const std::string& key,
+    Value* value)
+    : internal_(new Internal(change_type, extension_id, key, value)) {
+}
+
+SyncChange::SyncChangeType ExtensionSettingsSyncData::change_type() const {
+  return internal_->change_type_;
+}
+
+const std::string& ExtensionSettingsSyncData::extension_id() const {
+  return internal_->extension_id_;
+}
+
+const std::string& ExtensionSettingsSyncData::key() const {
+  return internal_->key_;
+}
+
+const Value* ExtensionSettingsSyncData::value() const {
+  return internal_->value_.get();
+}
+
+std::string ExtensionSettingsSyncData::ToString() const {
+  return std::string(extension_id()) + "/" + key();
+}
+
+ExtensionSettingsSyncData::Internal::Internal(
+    SyncChange::SyncChangeType change_type,
+    const std::string& extension_id,
+    const std::string& key,
+    Value* value)
+    : change_type_(change_type),
+      extension_id_(extension_id),
+      key_(key),
+      value_(value) {}
+
+ExtensionSettingsSyncData::Internal::~Internal() {}