MD WebUI: change all <dialog is="cr-dialog"> to 512px width

chrome/browser/resources/settings/printing_page/cups_add_printer_dialog_util.html

 <link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-dropdown/iron-dropdown.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-input/iron-input.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-input/paper-input-container.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-item/paper-item.html">
 <link rel="import" href="/printing_page/cups_printers_browser_proxy.html">
@@ skipping 60 matching lines @@
           <paper-item on-tap="onSelect_">[[item]]</paper-item>
         </template>
       </div>
     </iron-dropdown>
   </template>
 </dom-module>
 
 <dom-module id="add-printer-dialog">
   <template>
     <style include="settings-shared">
-      #dialog {
-        width: 525px;
-      }
-      
       #dialog .body {
         -webkit-padding-end: 0;
         -webkit-padding-start: 0;
         height: 350px;
       }
 
       #dialog .button-container {
         border-top: 1px solid rgba(0, 0, 0, 0.14);
         margin-top: 0;
         padding-top: 10px;
@@ skipping 12 matching lines @@
       <div class="body">
         <content select=".dialog-body"></content>
       </div>
       <div class="button-container">
         <content select=".dialog-buttons"></content>
       </div>
     </dialog>
   </template>
   <script src="cups_add_printer_dialog_util.js"></script>
 </dom-module>