Make CUPS USB printing play better with the settings page. This change does several things:

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

Index: chrome/browser/resources/settings/printing_page/cups_add_printer_dialog.html
diff --git a/chrome/browser/resources/settings/printing_page/cups_add_printer_dialog.html b/chrome/browser/resources/settings/printing_page/cups_add_printer_dialog.html
index eede8a01bce092946c4e98105daeb349315fb6c8..4f139b2ce025541eb8a4f66e10338f9838d73dc7 100644
--- a/chrome/browser/resources/settings/printing_page/cups_add_printer_dialog.html
+++ b/chrome/browser/resources/settings/printing_page/cups_add_printer_dialog.html
@@ -49,7 +49,7 @@
       <div class="dialog-title">$i18n{addPrintersNearbyTitle}</div>
       <div class="dialog-body">
         <add-printer-list printers="[[discoveredPrinters]]"
-            selected-printer="{{selectedPrinter}}">
+                          new-printer="{{newPrinter}}">

[stevenjb, 2017/04/10 19:49:55]

previous indent was correct

[Carlson, 2017/04/10 22:16:42]

Removed from this changelist

         </add-printer-list>
         <div class="center" id="noPrinterMessage" hidden>
            $i18n{noPrinterNearbyMessage}
@@ -68,7 +68,7 @@
           $i18n{cancelButtonText}
         </paper-button>
         <paper-button class="action-button" id="addPrinterButton"
-            disabled="[[!selectedPrinter]]" on-tap="switchToConfiguringDialog_">
+            disabled="[[!newPrinter]]" on-tap="switchToManufacturerDialog_">
           $i18n{addPrinterButtonText}
         </paper-button>
       </div>
@@ -348,7 +348,7 @@
 
     <!-- Printer Discovery Dialog -->
     <template is="dom-if" if="[[showDiscoveryDialog_]]" restamp>
-      <add-printer-discovery-dialog selected-printer="{{selectedPrinter}}">
+      <add-printer-discovery-dialog new-printer="{{newPrinter}}">
       </add-printer-discovery-dialog>
     </template>