Create a common directory of widgets and css.

appengine/chromium_rietveld/new_static/common/cr-title-handler.html

 <!-- Copyright (c) 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. -->
 
 <polymer-element name="cr-title-handler" attributes="titlePrefix titleSuffix">
     <template>
         <style>
             :host { display: none; }
         </style>
     </template>
@@ skipping 17 matching lines @@
                     title += ": ";
                 if (value.length)
                     title += value;
                 if (this.titleSuffix)
                     title += " - " + this.titleSuffix;
                 document.title = title;
             },
         });
     </script>
 </polymer-element>