Fix all remaining print preview closure compiler 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 03ce8f7240580a69aa658d3cf082c4864a428c89..43b07d26be844fcd1d010c94fd01304939024f72 100644
--- a/chrome/browser/resources/print_preview/print_preview.js
+++ b/chrome/browser/resources/print_preview/print_preview.js
@@ -1351,7 +1351,7 @@ cr.define('print_preview', function() {
 // <include src="search/destination_list_item.js">
 // <include src="search/destination_search.js">
 // <include src="search/provisional_destination_resolver.js">
-
+var printPreview;

[dpapad, 2017/05/08 20:40:10]

Can this be moved inside the anonymous function below?

var printPreview = new print_preview.PrintPreview();
printPreview.initialize();

[rbpotter, 2017/05/08 23:28:20]

Done. FYI, This triggered a bunch of new errors from some enums,
which is why there are some additional changes in the new
patchset. Also caused problems for the browser tests that were
relying on the global variable, so I added the boolean above and
check in this function to fix them. Let me know if this was not
a correct approach.

 window.addEventListener('DOMContentLoaded', function() {
   printPreview = new print_preview.PrintPreview();
   printPreview.initialize();