Add the basic code skeleton for system info event router

chrome/browser/extensions/event_names.cc

 // 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/event_names.h"
 
 namespace extensions {
 
 namespace event_names {
 
@@ skipping 52 matching lines @@
 const char kBluetoothOnDeviceDiscovered[] =
     "experimental.bluetooth.onDeviceDiscovered";
 const char kBluetoothOnDiscoveringChanged[] =
     "experimental.bluetooth.onDiscoveringChanged";
 const char kBluetoothOnPowerChanged[] =
     "experimental.bluetooth.onPowerChanged";
 #endif
 
 const char kOnPushMessage[] = "experimental.pushMessaging.onMessage";
 
+const char kOnStorageAvailableCapacityChanged[] =
+     "experimental.systemInfo.storage.onAvailableCapacityChanged";
+const char kOnStorageAdded[] = "experimental.systemInfo.storage.onAdded";
+const char kOnStorageRemoved[] = "experimental.systemInfo.storage.onRemoved";
+
 }  // namespace event_names
 
 }  // namespace extensions