MD Settings: more consistently fix error message space for search engine

chrome/browser/resources/settings/search_engines_page/search_engine_dialog.html

Index: chrome/browser/resources/settings/search_engines_page/search_engine_dialog.html
diff --git a/chrome/browser/resources/settings/search_engines_page/search_engine_dialog.html b/chrome/browser/resources/settings/search_engines_page/search_engine_dialog.html
index d749e17ec6c70a1dc7ea391ac59f540859645cb8..e8cfb8c48bfeea59215fb5280ee1586803d63308 100644
--- a/chrome/browser/resources/settings/search_engines_page/search_engine_dialog.html
+++ b/chrome/browser/resources/settings/search_engines_page/search_engine_dialog.html
@@ -13,8 +13,11 @@
           /**
            * Saves space for error message. Using calc to leave just enough
            * space at all font sizes (default 0, grow/shrink with font-size).
+           * Using padding instead of padding-bottom to prevent 
+           * paper-input-container's default padding rule to eat up the
+           * padding-bottom rule.
            */
-          padding-bottom: calc(1rem - 8px);
+          padding: 8px 0 calc(1rem - 8px) 0;
         };
       }
     </style>