Implement new SyncAPI and convert Preferences to it.

chrome/browser/sync/api/sync_change.cc

Index: chrome/browser/sync/api/sync_change.cc
diff --git a/chrome/browser/sync/api/sync_change.cc b/chrome/browser/sync/api/sync_change.cc
new file mode 100644
index 0000000000000000000000000000000000000000..62d62e06af2efbefecd43e112245cc148b488bb3
--- /dev/null
+++ b/chrome/browser/sync/api/sync_change.cc
@@ -0,0 +1,55 @@
+// 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_change.h"
+
+#include "chrome/browser/sync/api/sync_data.h"

[akalin, 2011/05/20 00:19:39]

no need for this, since you include it in the header already

[Nicolas Zea, 2011/05/20 02:00:28]

Done.

+
+SyncChange::SyncChange() : change_type_(ACTION_INVALID) {
+}
+
+SyncChange::SyncChange(SyncChangeType change_type, const SyncData& sync_data)
+    : change_type_(change_type),
+      sync_data_(sync_data) {
+  DCHECK(IsValid());
+}
+
+SyncChange::~SyncChange() {}
+
+bool SyncChange::IsValid() const {
+  if (change_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)

[akalin, 2011/05/20 00:19:39]

return sync_data_.GetDataType() != syncable::UNSPECIFIED;

[Nicolas Zea, 2011/05/20 02:00:28]

Done.

+      return false;
+    else
+      return true;
+  }
+
+  // Local changes must always have a tag.
+  if (sync_data_.GetTag().empty())
+    return false;
+
+  // Adds and updates must have valid specifics (checked by GetDataType())
+  if (change_type_ == ACTION_ADD || change_type_ == ACTION_UPDATE) {
+    if (sync_data_.GetDataType() != syncable::UNSPECIFIED)

[akalin, 2011/05/20 00:19:39]

here, too.

[Nicolas Zea, 2011/05/20 02:00:28]

Done.

+      return true;
+    else
+      return false;
+  } else {  // ACTION_DELETE only requires tag.
+    return true;
+  }
+
+  return true;
+}
+
+SyncChange::SyncChangeType SyncChange::change_type() const {
+  return change_type_;
+}
+
+SyncData SyncChange::sync_data() const {
+  return sync_data_;
+}