Remove duplicated code from sync related unit tests.

sync/api/sync_change_processor_wrapper_for_test.cc

Index: sync/api/sync_change_processor_wrapper_for_test.cc
diff --git a/sync/api/sync_change_processor_wrapper_for_test.cc b/sync/api/sync_change_processor_wrapper_for_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..638c63938fc40ef7ed1b86a0d136344f7dbe8f46
--- /dev/null
+++ b/sync/api/sync_change_processor_wrapper_for_test.cc
@@ -0,0 +1,28 @@
+// 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