PreloadCheck class for extension pre-install checks

extensions/browser/preload_check.cc

+// Copyright 2017 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 "extensions/browser/preload_check.h"
+
+#include "extensions/common/extension.h"
+
+namespace extensions {
+
+PreloadCheck::PreloadCheck(scoped_refptr<const Extension> extension)
+    : extension_(extension) {}
+
+PreloadCheck::~PreloadCheck() {}
+
+base::string16 PreloadCheck::GetErrorMessage() const {
+  return base::string16();
+}
+
+}  // namespace extensions