Implement new SyncAPI and convert Preferences to it.

chrome/browser/sync/api/sync_event.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/sync/api/sync_event.h"
+
+#include "chrome/browser/sync/api/sync_data.h"
+
+SyncEvent::SyncEvent() : event_type_(ACTION_INVALID) {
+}
+
+SyncEvent::SyncEvent(SyncEventType event_type, const SyncData& sync_data)
+    : event_type_(event_type),
+      sync_data_(sync_data) {
+  DCHECK(IsValid());
+}
+
+SyncEvent::~SyncEvent() {}
+
+bool SyncEvent::IsValid() const {
+  if (event_type_ == ACTION_INVALID || !sync_data_.IsValid())
+    return false;
+
+  // Data from the syncer must always have specifics.
+  if (!sync_data_.IsLocal()) {
+    if (sync_data_.GetDataType() == syncable::UNSPECIFIED)
+      return false;
+    else
+      return true;
+  }
+
+  // Local events must always have a tag.
+  if (sync_data_.GetTag().empty())
+    return false;
+
+  // Adds and updates must have valid specifics (checked by GetDataType())
+  if (event_type_ == ACTION_ADD || event_type_ == ACTION_UPDATE) {
+    if (sync_data_.GetDataType() != syncable::UNSPECIFIED)
+      return true;
+    else
+      return false;
+  } else {  // ACTION_DELETE only requires tag.
+    return true;
+  }
+
+  return true;
+}
+
+SyncEvent::SyncEventType SyncEvent::event_type() const {
+  return event_type_;
+}
+
+SyncData SyncEvent::sync_data() const {
+  return sync_data_;
+}