[css-variables] Make the var.foo interface only contain custom props with non-initial values.

--HG--
extra : rebase_source : 272c60b9151190ac0340607b2bd34dea20b40403

Author: tabatkins

css-variables/Overview.html

@@ -13,7 +13,7 @@
    content="CSS Custom Properties for Cascading Variables Module Level 1"
    name=dcterms.title>
   <meta content=text name=dcterms.type>
-  <meta content=2013-02-28 name=dcterms.issued>
+  <meta content=2013-03-01 name=dcterms.issued>
   <meta content="http://dev.w3.org/csswg/css-variables/"
    name=dcterms.creator>
   <meta content=W3C name=dcterms.publisher>
@@ -31,8 +31,7 @@
 
    <h1>CSS Custom Properties for Cascading Variables Module Level 1</h1>
 
-   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 28 February
-    2013</h2>
+   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 1 March 2013</h2>
 
    <dl>
     <dt>This version:
@@ -778,9 +777,8 @@ <h3 id=the-cssvariablesdeclaration-interface><span class=secno>4.2. </span>
   <p> The <dfn
    id=cssvariablesdeclaration><code>CSSVariablesDeclaration</code></dfn>
    interface exposes the <a href="#custom-property"><i>custom
-   properties</i></a> declared in the parent declaration block, in a more
-   convenient fashion than the <code>getPropertyValue()</code>/etc.
-   functions.
+   properties</i></a> declared in the parent declaration block that have a
+   non-initial value.
 
   <pre class=idl>interface CSSVariablesDeclaration {
   <a
@@ -800,7 +798,8 @@ <h3 id=the-cssvariablesdeclaration-interface><span class=secno>4.2. </span>
    <a
    href="http://dev.w3.org/csswg/cssom/#css-declaration-block-declarations"><dfn
    id=css-declaration-block-declarations>CSS declaration block
-   declarations</dfn></a>, with the "var-" prefix removed.
+   declarations</dfn></a> with a non-initial value, with the "var-" prefix
+   removed.
 
   <p> Before running any of the algorithms in this section, prepend "var-" to
    <var>varName</var>‘<code class=css>s value. </code>

css-variables/Overview.src.html

@@ -568,8 +568,9 @@ <h4 id='serializing-custom-props'>
 <h3 id='the-cssvariablesdeclaration-interface'>
 The <code>CSSVariablesDeclaration</code> Interface</h3>
 
-	The <dfn><code>CSSVariablesDeclaration</code></dfn> interface exposes the <i>custom properties</i> declared in the parent declaration block,
-	in a more convenient fashion than the <code>getPropertyValue()</code>/etc. functions.
+	The <dfn><code>CSSVariablesDeclaration</code></dfn> interface 
+	exposes the <i>custom properties</i> declared in the parent declaration block
+	that have a non-initial value.
 
 	<pre class='idl'>
 	interface CSSVariablesDeclaration {
@@ -581,7 +582,8 @@ <h3 id='the-cssvariablesdeclaration-interface'>
 
 	The <a href="http://dev.w3.org/2006/webapi/WebIDL/#dfn-supported-property-names">supported property names</a>
 	on a CSSStyleDeclaration object
-	are the property names of all the <i>custom properties</i> in the <a href="http://dev.w3.org/csswg/cssom/#css-declaration-block-declarations"><dfn>CSS declaration block declarations</dfn></a>,
+	are the property names of all the <i>custom properties</i> in the <a href="http://dev.w3.org/csswg/cssom/#css-declaration-block-declarations"><dfn>CSS declaration block declarations</dfn></a>
+	with a non-initial value,
 	with the "var-" prefix removed.
 
 	Before running any of the algorithms in this section,