Material WebUI: cr-slider element for intelligent range mapping

ui/webui/resources/cr_elements/compiled_resources2.gyp

 # Copyright 2014 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.
 {
   'targets': [
     {
       'target_name': 'cr_elements_resources',
       'type': 'none',
       'dependencies': [
         'network/compiled_resources2.gyp:*',
         'policy/compiled_resources2.gyp:*',
+        'cr_slider/compiled_resources2.gyp:*',
       ],
     },
   ]
 }