[selectors-5][editorial] Added initial WPTs

Author: SebastianZ

selectors-5/Overview.bs

@@ -11,6 +11,8 @@ Editor: Elika J. Etemad / fantasai, Apple, http://fantasai.inkedblade.net/contac
 Editor: Tab Atkins Jr., Google, http://xanthir.com/contact/, w3cid 42199
 Abstract: <a>Selectors</a> are patterns that match against elements in a tree, and as such form one of several technologies that can be used to select nodes in a document. Selectors have been optimized for use with HTML and XML, and are designed to be usable in performance-critical code. They are a core component of <abbr title="Cascading Style Sheets">CSS</abbr> (Cascading Style Sheets), which uses Selectors to bind style properties to elements in the document.
 Abstract: Selectors Level 5 describes the selectors that already exist in [[!selectors-4]], and further introduces new selectors for CSS and other languages that may need them.
+WPT Path Prefix: css/selectors/
+WPT Display: closed
 </pre>
 
 <pre class="link-defaults">
@@ -141,6 +143,10 @@ Exposing custom state: the '':state()'' pseudo-class</h2>
 	whose [=states set=] contains a string
 	that [=string/is=] the selector's argument's value.
 
+	<wpt>
+		parsing/parse-state.html
+	</wpt>
+
 	<!-- Using <<ident>>, rather than <<custom-ident>>,
 	     to avoid excluding the CSS-wide keywords. -->
 
@@ -201,6 +207,11 @@ Heading Structures: the heading pseudo-classes '':heading'', and '':heading()''<
 	<a>type selector</a>. Thus, a selector ''h1:heading(3)'' matches any
 	''h1'' tag which has an exposed heading level of 3.
 
+	<wpt>
+		heading.html
+		parsing/parse-heading.html
+	</wpt>
+
 <h2 id="combinators">
 Combinators</h2>