Remove search input cancel button in WebKit-OSX.

On input elements with a `type` of `search`, WebKit on OS X will
display a cancel button after text has been entered. This can
look ugly or be poorly position when you've added other styles to
the input (especially additional padding).

lib/reset.less

@@ -140,10 +140,11 @@ input[type="search"] { // Appearance in Safari/Chrome
      -moz-box-sizing: content-box;
           box-sizing: content-box;
 }
-input[type="search"]::-webkit-search-decoration {
+input[type="search"]::-webkit-search-decoration,
+input[type="search"]::-webkit-search-cancel-button {
   -webkit-appearance: none; // Inner-padding issues in Chrome OSX, Safari 5
 }
 textarea {
   overflow: auto; // Remove vertical scrollbar in IE6-9
   vertical-align: top; // Readability and alignment cross-browser
-}
+}