Compile print_preview, part 6: reduce down to 48 errors

chrome/browser/resources/print_preview/print_preview.js

Index: chrome/browser/resources/print_preview/print_preview.js
diff --git a/chrome/browser/resources/print_preview/print_preview.js b/chrome/browser/resources/print_preview/print_preview.js
index dff311b7cce43e2024e57a8baa54dd5bf4d69b04..089c472f064e54e1bf8a5de2550599ffcc0cad9b 100644
--- a/chrome/browser/resources/print_preview/print_preview.js
+++ b/chrome/browser/resources/print_preview/print_preview.js
@@ -358,7 +358,7 @@ cr.define('print_preview', function() {
           this.onCloudPrintDialogLinkClick_.bind(this));
       if ($('open-pdf-in-preview-link')) {
         this.tracker.add(
-            $('open-pdf-in-preview-link'),
+            getRequiredElement('open-pdf-in-preview-link'),
             'click',
             this.onOpenPdfInPreviewLinkClick_.bind(this));
       }
@@ -531,7 +531,7 @@ cr.define('print_preview', function() {
 
     /**
      * Attempts to print if needed and if ready.
-     * @return {PrintPreview.PrintAttemptResult_} Attempt result.
+     * @return {print_preview.PrintPreview.PrintAttemptResult_} Attempt result.
      * @private
      */
     printIfReady_: function() {
@@ -564,7 +564,7 @@ cr.define('print_preview', function() {
                       PRINT_WITH_SETTINGS_COLLAPSED);
         }
         this.nativeLayer_.startPrint(
-            this.destinationStore_.selectedDestination,
+            assert(this.destinationStore_.selectedDestination),
             this.printTicketStore_,
             this.cloudPrintInterface_,
             this.documentInfo_,
@@ -699,7 +699,7 @@ cr.define('print_preview', function() {
       assert(this.cloudPrintInterface_ != null,
              'Google Cloud Print is not enabled');
       this.cloudPrintInterface_.submit(
-          this.destinationStore_.selectedDestination,
+          assert(this.destinationStore_.selectedDestination),
           this.printTicketStore_,
           this.documentInfo_,
           event.data);