Reland r105404 with compile warning fixed.

chrome/browser/sync/glue/shared_change_processor_ref.cc

Index: chrome/browser/sync/glue/shared_change_processor_ref.cc
diff --git a/chrome/browser/sync/glue/shared_change_processor_ref.cc b/chrome/browser/sync/glue/shared_change_processor_ref.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e0b2a520abddedc92b38b4e5238a05d9680ab67c
--- /dev/null
+++ b/chrome/browser/sync/glue/shared_change_processor_ref.cc
@@ -0,0 +1,23 @@
+// Copyright (c) 2011 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 "chrome/browser/sync/glue/shared_change_processor_ref.h"
+
+namespace browser_sync {
+
+SharedChangeProcessorRef::SharedChangeProcessorRef(
+    const scoped_refptr<SharedChangeProcessor>& change_processor)
+    : change_processor_(change_processor) {
+  DCHECK(change_processor_.get());
+}
+
+SharedChangeProcessorRef::~SharedChangeProcessorRef() {}
+
+SyncError SharedChangeProcessorRef::ProcessSyncChanges(
+    const tracked_objects::Location& from_here,
+    const SyncChangeList& change_list) {
+  return change_processor_->ProcessSyncChanges(from_here, change_list);
+}
+
+}  // namespace browser_sync