[Sync] Move some things from driver to base.

components/sync/driver/invalidation_adapter.cc

-// Copyright 2014 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 "components/sync/driver/invalidation_adapter.h"
-
-namespace syncer {
-
-InvalidationAdapter::InvalidationAdapter(const Invalidation& invalidation)
-    : invalidation_(invalidation) {}
-
-InvalidationAdapter::~InvalidationAdapter() {}
-
-bool InvalidationAdapter::IsUnknownVersion() const {
-  return invalidation_.is_unknown_version();
-}
-
-const std::string& InvalidationAdapter::GetPayload() const {
-  return invalidation_.payload();
-}
-
-int64_t InvalidationAdapter::GetVersion() const {
-  return invalidation_.version();
-}
-
-void InvalidationAdapter::Acknowledge() {
-  invalidation_.Acknowledge();
-}
-
-void InvalidationAdapter::Drop() {
-  invalidation_.Drop();
-}
-
-}  // namespace syncer