Add systeminfo.storage API implementation skeleton

chrome/browser/extensions/api/system_info_storage/storage_info_provider.cc

Index: chrome/browser/extensions/api/system_info_storage/storage_info_provider.cc
diff --git a/chrome/browser/extensions/api/system_info_storage/storage_info_provider.cc b/chrome/browser/extensions/api/system_info_storage/storage_info_provider.cc
new file mode 100644
index 0000000000000000000000000000000000000000..56a7b290d9b9a04261b3a748245e622ca52a6aa9
--- /dev/null
+++ b/chrome/browser/extensions/api/system_info_storage/storage_info_provider.cc
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 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/extensions/api/system_info_storage/storage_info_provider.h"
+
+namespace extensions {
+namespace systeminfo {
+
+const char kStorageTypeUnknown[] = "unknown";
+const char kStorageTypeHardDisk[] = "harddisk";
+const char kStorageTypeRemovable[] = "removable";
+
+}  // namespace systeminfo
+}  // namespace extensions