Do not display local overlay suggestion box if there are no suggestions.

chrome/browser/resources/local_omnibox_popup/local_omnibox_popup.css

Index: chrome/browser/resources/local_omnibox_popup/local_omnibox_popup.css
diff --git a/chrome/browser/resources/local_omnibox_popup/local_omnibox_popup.css b/chrome/browser/resources/local_omnibox_popup/local_omnibox_popup.css
index 75ec3b6b291624c524dd8008a4f8fc0a408375a1..1390c4f84f6253ab10ee345787541684afebf921 100644
--- a/chrome/browser/resources/local_omnibox_popup/local_omnibox_popup.css
+++ b/chrome/browser/resources/local_omnibox_popup/local_omnibox_popup.css
@@ -15,6 +15,12 @@ body {
   padding-top: 6px;

[Dan Beam, 2013/04/15 23:05:51]

display: inline-block;

(http://jsfiddle.net/hV7Rv/)

[kmadhusu, 2013/04/15 23:33:21]

This also works. Is there any specific reason to prefer display:inline-block
over display:none?

[Dan Beam, 2013/04/15 23:48:48]

less code, that's what it was intended for

[kmadhusu, 2013/04/15 23:59:57]

Done.

 }
 
+#suggestionsBox:empty {
+  /* Hide the empty suggestions box since they display a small white blank
+   * overlay. Refer to http://crbug.com/229839 for more details. */
+  display: none;
+}
+
 .suggestion {
   -webkit-border-radius: 2px;
   background: -webkit-image-set(