NOT FOR COMMIT: Add DeviceInfo type and ChangeProcessor

sync/test/mock_transaction_observer.cc

Index: sync/test/mock_transaction_observer.cc
diff --git a/sync/test/mock_transaction_observer.cc b/sync/test/mock_transaction_observer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5365dc29a9aed42117de6d89013fda715ddb0452
--- /dev/null
+++ b/sync/test/mock_transaction_observer.cc
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+// Copyright (c) 2012 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 "sync/test/mock_transaction_observer.h"
+
+namespace syncer {
+
+namespace syncable {
+
+MockTransactionObserver::MockTransactionObserver()
+  : transactions_observed_(0) {
+}
+
+MockTransactionObserver::~MockTransactionObserver() {
+}
+
+int MockTransactionObserver::transactions_observed() {
+  return transactions_observed_;
+}
+
+void MockTransactionObserver::OnTransactionWrite(
+    const ImmutableWriteTransactionInfo& write_transaction_info,
+    ModelTypeSet models_with_changes) {
+  transactions_observed_++;
+}
+
+}  // namespace syncable
+
+}  // namespace syncer