[cssom] Serialize the specified unit for <angle>. https://www.w3.org/Bugs/Public/show_bug.cgi?id=23068

Author: Simon Pieters

cssom/Overview.html

@@ -2581,8 +2581,7 @@ <h4 id="serializing-css-values"><span class="secno">6.6.2 </span>Serializing CSS
  <a class="external" data-anolis-spec="dom" href="http://dom.spec.whatwg.org/#converted-to-ascii-lowercase">converted to ASCII lowercase</a>.</dd>
 
  <dt>&lt;angle&gt;</dt>
- <dd><p>The number of degrees serialized as per &lt;number&gt; followed by
- the literal string "<code title="">deg</code>".</dd>
+ <dd><p>The &lt;number&gt; component serialized as per &lt;number&gt; followed by the unit in canonical form as defined in its respective specification.</dd>
 
  <dt>&lt;color&gt;</dt>
  <dd>

cssom/Overview.src.html

@@ -2502,8 +2502,7 @@ <h4>Serializing CSS Values</h4>
  <span data-anolis-spec=dom>converted to ASCII lowercase</span>.</p></dd>
 
  <dt>&lt;angle></dt>
- <dd><p>The number of degrees serialized as per &lt;number> followed by
- the literal string "<code title>deg</code>".</p></dd>
+ <dd><p>The &lt;number> component serialized as per &lt;number> followed by the unit in canonical form as defined in its respective specification.</p></dd>
 
  <dt>&lt;color></dt>
  <dd>