Animations: Smooth interpolation for scale none

third_party/WebKit/LayoutTests/animations/composition/scale-composition.html

Index: third_party/WebKit/LayoutTests/animations/composition/scale-composition.html
diff --git a/third_party/WebKit/LayoutTests/animations/composition/scale-composition.html b/third_party/WebKit/LayoutTests/animations/composition/scale-composition.html
index 10804698da8066e57d92fca90bf0c57513a356d9..a473b09fad533fdf87ecdf3f8b1d38f1f4fbec6a 100644
--- a/third_party/WebKit/LayoutTests/animations/composition/scale-composition.html
+++ b/third_party/WebKit/LayoutTests/animations/composition/scale-composition.html
@@ -31,5 +31,63 @@ assertComposition({
   {at: 1, is: '7 8 9'},
   {at: 1.5, is: '8.5 7 4.5'},
 ]);
+
+assertComposition({
+  property: 'scale',
+  underlying: 'none',
+  addFrom: 'none',
+  replaceTo: '1.5',
+}, [
+  {at: -1, is: '0.5'},
+  {at: 0, is: '1'},
+  {at: 0.25, is: '1.125'},
+  {at: 0.75, is: '1.375'},
+  {at: 1, is: '1.5'},
+  {at: 2, is: '2'},
+]);
+
+assertComposition({
+  property: 'scale',
+  underlying: 'none',
+  addFrom: '4 5 6',
+  replaceTo: 'none',
+}, [
+  {at: -1, is: '7 9 11'},
+  {at: 0, is: '4 5 6'},
+  {at: 0.25, is: '3.25 4 4.75'},
+  {at: 0.75, is: '1.75 2 2.25'},
+  {at: 1, is: 'none'},
+  {at: 2, is: '-2 -3 -4'},
+]);
+
+assertComposition({
+  property: 'scale',
+  underlying: '1 2 3',
+  addFrom: 'none',
+  replaceTo: '7 8 9',
+}, [
+  {at: -0.5, is: '-2 -1 0'},
+  {at: 0, is: '1 2 3'},
+  {at: 0.25, is: '2.5 3.5 4.5'},
+  {at: 0.5, is: '4 5 6'},
+  {at: 0.75, is: '5.5 6.5 7.5'},
+  {at: 1, is: '7 8 9'},
+  {at: 1.5, is: '10 11 12'},
+]);
+
+assertComposition({
+  property: 'scale',
+  underlying: '1 2 3',
+  addFrom: '4 5 6',
+  replaceTo: 'none',
+}, [
+  {at: -0.5, is: '5.5 14.5 26.5'},
+  {at: 0, is: '4 10 18'},
+  {at: 0.25, is: '3.25 7.75 13.75'},
+  {at: 0.5, is: '2.5 5.5 9.5'},
+  {at: 0.75, is: '1.75 3.25 5.25'},
+  {at: 1, is: 'none'},
+  {at: 1.5, is: '-0.5 -3.5 -7.5'},
+]);
 </script>
 </body>