Meta: provide definition type to CSS <source-size-*>

Author: cdoublev

source

@@ -29112,9 +29112,9 @@ was an English &lt;a href="/wiki/Music_hall">music hall&lt;/a> singer, ...</code
   <p>A <dfn>valid source size list</dfn> is a string that matches the following grammar:
   <ref spec=CSSVALUES> <ref spec=MQ></p>
 
-<pre><code class="html"><dfn>&lt;source-size-list></dfn> = [ <span>&lt;source-size></span># , ]? <span>&lt;source-size-value></span>
-<dfn>&lt;source-size></dfn> = <span>&lt;media-condition></span> <span>&lt;source-size-value></span>
-<dfn>&lt;source-size-value></dfn> = <span>&lt;length></span></code></pre>
+<pre><code class="html"><dfn type>&lt;source-size-list></dfn> = [ <span>&lt;source-size></span># , ]? <span>&lt;source-size-value></span>
+<dfn type>&lt;source-size></dfn> = <span>&lt;media-condition></span> <span>&lt;source-size-value></span>
+<dfn type>&lt;source-size-value></dfn> = <span>&lt;length></span></code></pre>
 
   <p>A <span>&lt;source-size-value></span> must not be negative, and must not use CSS functions
   other than the <span>math functions</span>.</p>