Refactor ModelTypePayloadMap and ObjectIdPayloadMap to StateMaps.

sync/internal_api/public/base/invalidation_state_test_util.h

+// 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.
+
+#ifndef SYNC_INTERNAL_API_PUBLIC_BASE_INVALIDATION_STATE_TEST_UTIL_H_
+#define SYNC_INTERNAL_API_PUBLIC_BASE_INVALIDATION_STATE_TEST_UTIL_H_
+
+#include <iosfwd>
+
+#include "testing/gmock/include/gmock/gmock.h"
+
+namespace syncer {
+
+struct InvalidationState;
+
+void PrintTo(const InvalidationState& state, ::std::ostream* os);
+
+::testing::Matcher<const InvalidationState&> Eq(
+    const InvalidationState& expected);
+
+}  // namespace syncer
+
+#endif  // SYNC_INTERNAL_API_PUBLIC_BASE_INVALIDATION_STATE_TEST_UTIL_H_