Update Polymer from 1.2.1 -> 1.2.3

third_party/polymer/v1_0/components-chromium/paper-dialog-behavior/paper-dialog-behavior-extracted.js

 /**
-Use `Polymer.PaperDialogBehavior` and `paper-dialog-common.css` to implement a Material Design
+Use `Polymer.PaperDialogBehavior` and `paper-dialog-shared-styles.html` to implement a Material Design
 dialog.
 
 For example, if `<paper-dialog-impl>` implements this behavior:
 
     <paper-dialog-impl>
         <h2>Header</h2>
         <div>Dialog body</div>
         <div class="buttons">
             <paper-button dialog-dismiss>Cancel</paper-button>
             <paper-button dialog-confirm>Accept</paper-button>
         </div>
     </paper-dialog-impl>
 
-`paper-dialog-common.css` provide styles for a header, content area, and an action area for buttons.
+`paper-dialog-shared-styles.html` provide styles for a header, content area, and an action area for buttons.
 Use the `<h2>` tag for the header and the `buttons` class for the action area. You can use the
 `paper-dialog-scrollable` element (in its own repository) if you need a scrolling content area.
 
 Use the `dialog-dismiss` and `dialog-confirm` attributes on interactive controls to close the
 dialog. If the user dismisses the dialog with `dialog-confirm`, the `closingReason` will update
 to include `confirmed: true`.
 
 ### Styling
 
 The following custom properties and mixins are available for styling.
@@ skipping 185 matching lines @@
         } else {
           this._focusNode.focus();
         }
       }
     }
 
   };
 
   /** @polymerBehavior */
   Polymer.PaperDialogBehavior = [Polymer.IronOverlayBehavior, Polymer.PaperDialogBehaviorImpl];