[CUPS] Implement the UI handler for adding a new printer.

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

 <link rel="import" href="chrome://resources/html/polymer.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-dropdown-menu/paper-dropdown-menu-light.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-input/paper-input.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-spinner/paper-spinner.html">
 <link rel="import" href="/i18n_setup.html">
 <link rel="import" href="/printing_page/cups_add_printer_dialog_util.html">
 <link rel="import" href="/printing_page/cups_printers_browser_proxy.html">
 <link rel="import" href="/settings_shared_css.html">
 
@@ skipping 166 matching lines @@
         </div>
       </div>
       <div class="dialog-buttons">
         <paper-button id="discoverPrintersButton"
             on-tap="switchToDiscoveryDialog_">
           $i18n{discoverPrintersButtonText}
         </paper-button>
         <paper-button class="cancel-button" on-tap="onCancelTap_">
           $i18n{cancelButtonText}
         </paper-button>
-        <paper-button class="action-button" on-tap="switchToManufacturerDialog_"
-            disabled="[[addPrinterNotAllowed_(newPrinter.printerName,
-                                              newPrinter.printerAddress)]]">
+        <paper-button class="action-button" on-tap="switchToConfiguringDialog_"
+            disabled="[[!newPrinter.printerName]]">
           $i18n{addPrinterButtonText}
         </paper-button>
       </div>
     </add-printer-dialog>
   </template>
 </dom-module>
 
 <dom-module id="add-printer-manufacturer-model-dialog">
   <template>
     <style include="settings-shared">
       .settings-box {
         border-top: none;
         margin-bottom: 10px;
       }
 
       .settings-box .start .label {
         color: var(--google-grey-700);
       }
 
+      .error-message {
+        background-color: var(--google-red-100);
+        color: red;
+        margin-top: 10px;
+        padding: 10px 20px;
+      }
+
       #manuallyAddPrinterButton {
         -webkit-margin-end: 210px;
       }
     </style>
     <add-printer-dialog>
       <div class="dialog-body">
         <div class="settings-box first">
           $i18n{selectManufacturerModelMessage}
         </div>
         <div class="settings-box two-line">
           <div class="start">
             <div class="label">$i18n{printerManufacturer}</div>
             <div class="secondary">
               <drop-down-search-box items="[[manufacturerList]]"
                   selected-item="{{newPrinter.printerManufacturer}}">
               </drop-down-search-box>
             </div>
           </div>
         </div>
         <div class="settings-box two-line">
           <div class="start">
             <div class="label">$i18n{printerModel}</div>
             <div class="secondary">
               <drop-down-search-box items="[[modelList]]"
                   selected-item="{{newPrinter.printerModel}}">
               </drop-down-search-box>
             </div>
           </div>
         </div>
+        <div class="error-message" hidden="[[!setupFailed]]">
+          Driver not found (exact error message TBD)
+        </div>
       </div>
       <div class="dialog-buttons">
         <paper-button id="manuallyAddPrinterButton"
             on-tap="switchToManualAddDialog_">
           $i18n{manuallyAddPrinterButtonText}
         </paper-button>
         <paper-button class="cancel-button" on-tap="onCancelTap_">
           $i18n{cancelButtonText}
         </paper-button>
         <paper-button class="action-button" id="addPrinterButton"
@@ skipping 45 matching lines @@
 
     <!-- Configuring Printer Dialog -->
     <template is="dom-if" if="[[showConfiguringDialog_]]" restamp>
       <add-printer-configuring-dialog
           printer-name="[[getConfiguringPrinterName_()]]">
       </add-printer-configuring-dialog>
     </template>
 
     <!-- Manufacturer and Model Dialog -->
     <template is="dom-if" if="[[showManufacturerDialog_]]" restamp>
-      <add-printer-manufacturer-model-dialog new-printer="{{newPrinter}}">
+      <add-printer-manufacturer-model-dialog new-printer="{{newPrinter}}"
+          setup-failed="[[setupFailed]]">
       </add-printer-manufacturer-model-dialog>
     </template>
 
   </template>
   <script src="cups_add_printer_dialog.js"></script>
 </dom-module>