Print Preview Componentization: Fix bugs found during Windows testing

Bug: 773928
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I329273eb229f63be362e551cb67f8472e1867ae8
Reviewed-on: https://chromium-review.googlesource.com/972198Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#544774}

chrome/browser/resources/print_preview/new/header.js

@@ -88,13 +88,13 @@ Polymer({
    */
   computeLabelInfo_: function() {
     const saveToPdfOrDrive = this.isPdfOrDrive_();
-    let numPages = this.getSetting('pages').value.length;
+    let numPages = this.getSettingValue('pages').length;
     let numSheets = numPages;
-    if (!saveToPdfOrDrive && this.getSetting('duplex').value) {
+    if (!saveToPdfOrDrive && this.getSettingValue('duplex')) {
       numSheets = Math.ceil(numPages / 2);
     }
 
-    const copies = /** @type {number} */ (this.getSetting('copies').value);
+    const copies = parseInt(this.getSettingValue('copies'), 10);
     numSheets *= copies;
     numPages *= copies;
 

chrome/browser/resources/print_preview/new/model.js

@@ -365,7 +365,7 @@ Polymer({
       this.set('settings.dpi.value', defaultOption);
     } else if (
         caps && caps.dpi && caps.dpi.option && caps.dpi.option.length > 0) {
-      this.set('settings.dpi.value', caps.dpi.option[0]);
+      this.set('settings.dpi.unavailableValue', caps.dpi.option[0]);
     }
 
     if (this.settings.vendorItems.available) {
@@ -518,7 +518,7 @@ Polymer({
       duplex: this.getSettingValue('duplex') ?
           print_preview_new.DuplexMode.LONG_EDGE :
           print_preview_new.DuplexMode.SIMPLEX,
-      copies: this.getSettingValue('copies'),
+      copies: parseInt(this.getSettingValue('copies'), 10),
       collate: this.getSettingValue('collate'),
       shouldPrintBackgrounds: this.getSettingValue('cssBackground'),
       shouldPrintSelectionOnly: false,  // only used in print preview