REFERRER: Ignore empty strings.

Author: mikewest

specs/referrer-policy/index.src.html

@@ -428,8 +428,8 @@ <h3 id="referrer-policy-delivery-meta">Delivery via <a element>meta</a></h3>
 
         <li>
           If the <code><a element>meta</a></code> element lacks a
-          <code><a element-attr>content</a></code> attribute, or if that
-          attribute's value is the empty string, then abort these steps.
+          <code><a element-attr>content</a></code> attribute then abort these
+          steps.
         </li>
 
         <li>
@@ -444,6 +444,10 @@ <h3 id="referrer-policy-delivery-meta">Delivery via <a element>meta</a></h3>
           leading and trailing whitespace</a>.
         </li>
 
+        <li>
+          If <var>meta-value</var> is the empty string, then abort these steps.
+        </li>
+
         <li>
           Let <var>policy</var> be the result of executing the
           [[#determine-policy-for-token]] algorithm on <var>meta-value</var>.