[CUPS] Implement the CUPS printer PPD file picker in the manufacturer and model dialog.

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 188 matching lines @@
     <style include="settings-shared">
       .settings-box {
         border-top: none;
         margin-bottom: 10px;
       }
 
       .settings-box .start .label {
         color: var(--google-grey-700);
       }
 
+      .last {
+        margin-top: 20px;
+      }
+
+      paper-input {
+        --paper-input-container-color: var(--google-grey-500);
+        --paper-input-container-input: {
+          font-size: inherit;
+          border: 1px solid lightgray;
+        };
+        --paper-input-container-underline: {
+          display: none;
+        };
+        --paper-input-container-underline-focus: {
+          display: none;
+        };
+        width: 340px;
+      }
+
       #manuallyAddPrinterButton {
         -webkit-margin-end: 210px;
       }
+
+      #browseButton {
+        color: black;
+        font-size: inherit;
+      }
     </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">$i18n{printerModel}</div>
             <div class="secondary">
               <drop-down-search-box items="[[modelList]]"
                   selected-item="{{newPrinter.printerModel}}">
               </drop-down-search-box>
             </div>
           </div>
         </div>
+        <div class="settings-box two-line last">
+          <div class="start">
+            <div class="label">$i18n{selectDriver}</div>
+            <div class="secondary">
+              <paper-input no-label-float readonly>
+                <paper-button suffix id="browseButton" on-tap="onBrowseFile_">
+                  $i18n{selectDriverButtonText}
+                </paper-button>
+              </paper-input>
+            </div>
+          </div>
+        </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 52 matching lines @@
 
     <!-- Manufacturer and Model Dialog -->
     <template is="dom-if" if="[[showManufacturerDialog_]]" restamp>
       <add-printer-manufacturer-model-dialog new-printer="{{newPrinter}}">
       </add-printer-manufacturer-model-dialog>
     </template>
 
   </template>
   <script src="cups_add_printer_dialog.js"></script>
 </dom-module>