Web Animations: Support animation of SVG number attributes

LayoutTests/animations/svg-attribute-interpolation/svg-z-interpolation.html

Index: LayoutTests/animations/svg-attribute-interpolation/svg-z-interpolation.html
diff --git a/LayoutTests/animations/svg-attribute-interpolation/svg-edgeMode-interpolation.html b/LayoutTests/animations/svg-attribute-interpolation/svg-z-interpolation.html
similarity index 53%
copy from LayoutTests/animations/svg-attribute-interpolation/svg-edgeMode-interpolation.html
copy to LayoutTests/animations/svg-attribute-interpolation/svg-z-interpolation.html
index 66d931fb39ed977ceacfdf8c56f119b4910c5b3d..d2d894f5e9794452b0a92cff103ff61e4a5a0735 100644
--- a/LayoutTests/animations/svg-attribute-interpolation/svg-edgeMode-interpolation.html
+++ b/LayoutTests/animations/svg-attribute-interpolation/svg-z-interpolation.html
@@ -5,7 +5,7 @@
 <svg width="90" height="90">
 <defs>
 <filter>
-<feConvolveMatrix class="target" />
+<fePointLight class="target" />
 </filter>
 </defs>
 </svg>
@@ -14,16 +14,16 @@
 <script>
 'use strict';
 assertAttributeInterpolation({
-  property: 'edgeMode',
-  from: 'duplicate',
-  to: 'wrap'
+  property: 'z',
+  from: '1',
+  to: '6'
 }, [
-  {at: -0.4, is: 'duplicate'},
-  {at: 0, is: 'duplicate'},
-  {at: 0.2, is: 'duplicate'},
-  {at: 0.6, is: 'wrap'},
-  {at: 1, is: 'wrap'},
-  {at: 1.4, is: 'wrap'}
+  {at: -0.4, is: -1},
+  {at: 0, is: 1},
+  {at: 0.2, is: 2},
+  {at: 0.6, is: 4},
+  {at: 1, is: 6},
+  {at: 1.4, is: 8}
 ]);
 </script>
 </body>