Initial skeleton for System Indicator API

chrome/renderer/resources/extensions/system_indicator_custom_bindings.js

 // 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.
 
-// Custom bindings for the browserAction API.
+// Custom bindings for the systemIndicator API.
+// TODO(dewittj) Refactor custom bindings to reduce redundancy between the
+// extension action APIs.
 
 var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
 var setIcon = require('setIcon').setIcon;
 
-chromeHidden.registerCustomHook('browserAction', function(bindingsAPI) {
+chromeHidden.registerCustomHook('systemIndicator', function(bindingsAPI) {
   var apiFunctions = bindingsAPI.apiFunctions;
 
   apiFunctions.setHandleRequest('setIcon', function(details, callback) {
     setIcon(details, callback, this.name, this.definition.parameters,
-        'browser action');
+            'system indicator');
   });
 });
+