Print Preview: don't overlap long text with clear search icon

See bug for screenshots.

Bug: 971960
Change-Id: I1c85419251460630de612dd465773d80bfd6010a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1649189
Commit-Queue: Hector Carmona <hcarmona@chromium.org>
Auto-Submit: Rebekah Potter <rbpotter@chromium.org>
Reviewed-by: Hector Carmona <hcarmona@chromium.org>
Cr-Commit-Position: refs/heads/master@{#667258}

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

@@ -45,6 +45,10 @@
         right: auto;
       }
 
+      :host([has-search-text]) cr-input {
+        --cr-input-padding-end: 24px;
+      }
+
       .search-box-input {
         width: 100%;
       }