Update Polymer components.

third_party/polymer/components/paper-dialog-behavior/paper-dialog-behavior.html

 <!--
 @license
 Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
 This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 Code distributed by Google as part of the polymer project is also
 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 -->
 
@@ skipping 30 matching lines @@
 This element has `role="dialog"` by default. Depending on the context, it may be more appropriate
 to override this attribute with `role="alertdialog"`.
 
 If `modal` is set, the element will prevent the focus from exiting the element.
 It will also ensure that focus remains in the dialog.
 
 @hero hero.svg
 @demo demo/index.html
 @polymerBehavior Polymer.PaperDialogBehavior
 */
-
   Polymer.PaperDialogBehaviorImpl = {
 
     hostAttributes: {
       'role': 'dialog',
       'tabindex': '-1'
     },
 
     properties: {
 
       /**
@@ skipping 69 matching lines @@
         }
       }
     }
 
   };
 
   /** @polymerBehavior */
   Polymer.PaperDialogBehavior = [Polymer.IronOverlayBehavior, Polymer.PaperDialogBehaviorImpl];
 
 </script>