[css-animations-2] Add some references to the CSSAnimation() constructor

Since it seems likely we'll add this at some point and I'll probably
forget to add these references back at that point.

Author: birtles

css-animations-2/Overview.bs

@@ -70,8 +70,8 @@ The <dfn>owning element</dfn> of a CSS Animation refers to the element or
 pseudo-element to which the 'animation-name' property was applied that generated
 the animation.
 
-If an animation was generated directly by script then it has no <a>owning
-element</a>.
+If an animation was generated directly by script (e.g. using
+the {{CSSAnimation()}} constructor) then it has no <a>owning element</a>.
 
 If an animation generated using the markup defined in this specification is
 later disassociated from that markup by an update to the computed value of the
@@ -285,9 +285,9 @@ The values of 'animation-composition' have the meaning defined for the
 corresponding values of the <a>composite operation</a> defined in Web
 Animations [[!WEB-ANIMATIONS]].
 
-When specified in a keyframe, 'animation-composition' defines the operation
-used for each property specified in that keyframe until the next keyframe
-specifying each property.
+When specified in a keyframe, 'animation-composition' defines the composite
+operation to use for each property specified in that keyframe until the next
+keyframe specifying each property.
 
 <div class='example'>
   For example, the following stylesheet defines two different animations
@@ -428,7 +428,9 @@ interface CSSAnimation : Animation {
 ::  The key used to find matching keyframes rules that define <a>target
     effect</a> at the point when the animation was created.
     This is the value of the 'animation-name' property that caused this
-    object to be generated.
+    object to be generated or, if this object was generated using the
+    programming interface, the <code>animationName</code> argument
+    that was passed to the {{CSSAnimation()}} constructor.
 
 <div class="issue">
 

css-animations-2/Overview.html

@@ -188,8 +188,8 @@ <h3 class="heading settled" data-level="2.1" id="owning-element-section"><span c
    <p>The <dfn data-dfn-type="dfn" data-noexport="" id="owning-element">owning element<a class="self-link" href="#owning-element"></a></dfn> of a CSS Animation refers to the element or
 pseudo-element to which the <a class="property" data-link-type="propdesc" href="https://drafts.csswg.org/css-animations-1/#propdef-animation-name">animation-name</a> property was applied that generated
 the animation.</p>
-   <p>If an animation was generated directly by script then it has no <a data-link-type="dfn" href="#owning-element">owning
-element</a>.</p>
+   <p>If an animation was generated directly by script (e.g. using
+the <code class="idl"><a data-link-type="idl" href="#dom-cssanimation-cssanimation">CSSAnimation()</a></code> constructor) then it has no <a data-link-type="dfn" href="#owning-element">owning element</a>.</p>
    <p>If an animation generated using the markup defined in this specification is
 later disassociated from that markup by an update to the computed value of the <a class="property" data-link-type="propdesc" href="https://drafts.csswg.org/css-animations-1/#propdef-animation-name">animation-name</a> property on the <a data-link-type="dfn" href="#owning-element">owning element</a>, the animation is
 disassociated from its <a data-link-type="dfn" href="#owning-element">owning element</a> (that is, it has no <a data-link-type="dfn" href="#owning-element">owning
@@ -371,9 +371,9 @@ <h3 class="heading settled" data-level="3.2" id="animation-composition"><span cl
    <p>The values of <a class="property" data-link-type="propdesc" href="#propdef-animation-composition">animation-composition</a> have the meaning defined for the
 corresponding values of the <a data-link-type="dfn" href="https://w3c.github.io/web-animations/#composite-operation">composite operation</a> defined in Web
 Animations <a data-link-type="biblio" href="#biblio-web-animations">[WEB-ANIMATIONS]</a>.</p>
-   <p>When specified in a keyframe, <a class="property" data-link-type="propdesc" href="#propdef-animation-composition">animation-composition</a> defines the operation
-used for each property specified in that keyframe until the next keyframe
-specifying each property.</p>
+   <p>When specified in a keyframe, <a class="property" data-link-type="propdesc" href="#propdef-animation-composition">animation-composition</a> defines the composite
+operation to use for each property specified in that keyframe until the next
+keyframe specifying each property.</p>
    <div class="example" id="example-e146d515">
     <a class="self-link" href="#example-e146d515"></a> For example, the following stylesheet defines two different animations
   targetting the <a class="property" data-link-type="propdesc" href="https://drafts.csswg.org/css-transforms-2/#propdef-scale">scale</a> property. 
@@ -503,7 +503,9 @@ <h3 class="heading settled" data-level="5.1" id="the-CSSAnimation-interface"><sp
      <p>The key used to find matching keyframes rules that define <a data-link-type="dfn" href="https://w3c.github.io/web-animations/#target-effect">target
 effect</a> at the point when the animation was created.
 This is the value of the <a class="property" data-link-type="propdesc" href="https://drafts.csswg.org/css-animations-1/#propdef-animation-name">animation-name</a> property that caused this
-object to be generated.</p>
+object to be generated or, if this object was generated using the
+programming interface, the <code>animationName</code> argument
+that was passed to the <code class="idl"><a data-link-type="idl" href="#dom-cssanimation-cssanimation">CSSAnimation()</a></code> constructor.</p>
    </dl>
    <div class="issue" id="issue-2082bf7a">
     <a class="self-link" href="#issue-2082bf7a"></a>