[cssom] Fix setProperty to not always abort, oops

Author: Simon Pieters

cssom/Overview.html

@@ -2219,9 +2219,8 @@ <h4 id="the-cssstyledeclaration-interface"><span class="secno">6.5.1 </span>The
  <li><p>If the <a href="#concept-css-declaration-block-readonly-flag" title="concept-css-declaration-block-readonly-flag">readonly flag</a> is set, <a class="external" href="http://dom.spec.whatwg.org/#concept-throw" title="concept-throw">throw</a>
  an <code class="external"><a href="http://dom.spec.whatwg.org/#nomodificationallowederror">NoModificationAllowedError</a></code> exception and terminate these steps.</li>
  <li><p>If <var title="">property</var> is not an <a class="external" href="http://dom.spec.whatwg.org/#ascii-case-insensitive">ASCII case-insensitive</a> match for a supported property that is defined to be
- case-insensitive, terminate this algorithm.</li>
- <li><p>If <var title="">property</var> is not a <a class="external" href="http://dom.spec.whatwg.org/#case-sensitive">case-sensitive</a> match for a supported property that is defined to be
- case-sensitive, terminate this algorithm.</li>
+ case-insensitive, or if <var title="">property</var> is not a <a class="external" href="http://dom.spec.whatwg.org/#case-sensitive">case-sensitive</a> match for a supported property that is defined to
+ be case-sensitive, terminate this algorithm.</li>
  <li><p>If <var title="">value</var> is the empty string, invoke <code title="dom-CSSStyleDeclaration-removeProperty"><a href="#dom-cssstyledeclaration-removeproperty">removeProperty()</a></code>
  with <var title="">property</var> as argument and terminate this algorithm.</li>
  <li><p>If <var title="">priority</var> is neither an <a class="external" href="http://dom.spec.whatwg.org/#ascii-case-insensitive">ASCII case-insensitive</a> match for the string "<code title="">important</code>"

cssom/Overview.src.html

@@ -2150,9 +2150,8 @@ <h4>The <code title>CSSStyleDeclaration</code> Interface</h4>
  <li><p>If the <span title=concept-css-declaration-block-readonly-flag>readonly flag</span> is set, <span data-anolis-spec=dom title=concept-throw>throw</span>
  an <code data-anolis-spec=dom>NoModificationAllowedError</code> exception and terminate these steps.</li>
  <li><p>If <var title>property</var> is not an <span data-anolis-spec=dom>ASCII case-insensitive</span> match for a supported property that is defined to be
- case-insensitive, terminate this algorithm.</p></li>
- <li><p>If <var title>property</var> is not a <span data-anolis-spec=dom>case-sensitive</span> match for a supported property that is defined to be
- case-sensitive, terminate this algorithm.</p></li>
+ case-insensitive, or if <var title>property</var> is not a <span data-anolis-spec=dom>case-sensitive</span> match for a supported property that is defined to
+ be case-sensitive, terminate this algorithm.</p></li>
  <li><p>If <var title>value</var> is the empty string, invoke <code title='dom-CSSStyleDeclaration-removeProperty'>removeProperty()</code>
  with <var title>property</var> as argument and terminate this algorithm.</p></li>
  <li><p>If <var title>priority</var> is neither an <span data-anolis-spec=dom>ASCII case-insensitive</span> match for the string "<code title>important</code>"