[Sync] Rework Invalidator-related unit tests

sync/internal_api/public/base/invalidation_state.cc

+// 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/internal_api/public/base/invalidation_state.h"
+
+#include "base/values.h"
+
+namespace syncer {
+
+bool AckHandle::Equals(const AckHandle& other) const {
+  return true;
+}
+
+scoped_ptr<base::Value> AckHandle::ToValue() const {
+  return scoped_ptr<base::Value>(new DictionaryValue());
+}
+
+bool AckHandle::ResetFromValue(const base::Value& value) {
+  return true;
+}
+
+bool InvalidationState::Equals(const InvalidationState& other) const {
+  return (payload == other.payload) && ack_handle.Equals(other.ack_handle);
+}
+
+scoped_ptr<base::DictionaryValue> InvalidationState::ToValue() const {
+  scoped_ptr<DictionaryValue> value(new DictionaryValue());
+  value->SetString("payload", payload);
+  value->Set("ackHandle", ack_handle.ToValue().release());
+  return value.Pass();
+}
+
+bool InvalidationState::ResetFromValue(const base::DictionaryValue& value) {
+  const base::Value* ack_handle_value = NULL;
+  return
+      value.GetString("payload", &payload) &&
+      value.Get("ackHandle", &ack_handle_value) &&
+      ack_handle.ResetFromValue(*ack_handle_value);
+}
+
+}  // namespace syncer