Remove duplicated code from sync related unit tests.

sync/api/sync_change_processor_wrapper_for_test.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 "sync/api/sync_change_processor_wrapper_for_test.h"
+
+namespace syncer {
+
+SyncChangeProcessorWrapperForTest::SyncChangeProcessorWrapperForTest(
+    syncer::SyncChangeProcessor* wrapped)
+    : wrapped_(wrapped) {
+  DCHECK(wrapped_);
+}
+
+SyncChangeProcessorWrapperForTest::~SyncChangeProcessorWrapperForTest() {}
+
+syncer::SyncError SyncChangeProcessorWrapperForTest::ProcessSyncChanges(
+    const tracked_objects::Location& from_here,
+    const syncer::SyncChangeList& change_list) {
+  return wrapped_->ProcessSyncChanges(from_here, change_list);
+}
+
+syncer::SyncDataList SyncChangeProcessorWrapperForTest::GetAllSyncData(
+    syncer::ModelType type) const {
+  return wrapped_->GetAllSyncData(type);
+}
+
+}  // namespace syncer