Settings: fix long url breaking layout for zoom level page.

Bug: 866941
Change-Id: I1c5a6a8117eb347dbe838ae1818e726ff1dafcb7
Reviewed-on: https://chromium-review.googlesource.com/1175062Reviewed-by: Esmael El-Moslimany <aee@chromium.org>
Commit-Queue: Scott Chen <scottchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583064}

chrome/browser/resources/settings/site_settings/zoom_levels.html

@@ -25,6 +25,15 @@
       #empty {
         margin-top: 15px;
       }
+
+      .list-item .favicon-image {
+        flex-shrink: 0;
+      }
+
+      .list-item .middle {
+        overflow-x: hidden;
+        text-overflow: ellipsis;
+      }
     </style>
     <div class="list-frame vertical-list" id="listContainer">
       <iron-list id="list" preserve-focus items="[[sites_]]"