Print Preview destinations dialog: Set line-height relative to font

Bug: 924060
Change-Id: I828620e627ccda10e685fb2e8342e35451ecef7c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1652694
Reviewed-by: Esmael El-Moslimany <aee@chromium.org>
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#668568}

chrome/browser/resources/print_preview/ui/destination_dialog.html

@@ -57,7 +57,7 @@
 
       .user-info {
         font-size: calc(13 / 15 * 1em);
-        line-height: normal;
+        line-height: calc(20 / 15 * 1em);
         margin-bottom: 14px;
         margin-top: 8px;
       }