Composited Animations: Introduce pixel-ref layout tests.

LayoutTests/animations/resources/composited-animations-data/translate-rotate-scale.js

Index: LayoutTests/animations/resources/composited-animations-data/translate-rotate-scale.js
diff --git a/LayoutTests/animations/resources/composited-animations-data/translate-rotate-scale.js b/LayoutTests/animations/resources/composited-animations-data/translate-rotate-scale.js
new file mode 100644
index 0000000000000000000000000000000000000000..3d8750f3b14ae87d663c089e5b917acd848aade8
--- /dev/null
+++ b/LayoutTests/animations/resources/composited-animations-data/translate-rotate-scale.js
@@ -0,0 +1,71 @@
+var animateTranslate = {
+  keyframes: [
+    {translate: '0px'},
+    {translate: '600px'}
+  ],
+  style: `background: darkgreen; float: none;`,
+  samples: [
+    {at: 0},
+    {at: 0.15},
+    {at: 0.25},
+    {at: 0.35},
+    {at: 0.5},
+    {at: 0.65},
+    {at: 0.75},
+    {at: 0.85},
+    {at: 1.05},
+    {at: 1.15},
+  ]
+};
+
+var animateRotate = {
+  keyframes: [
+    {rotate: '-10deg'},
+    {rotate: '470deg'}
+  ],
+  style: `background: maroon; margin: 5px;`,
+  samples: [
+    {at: 0},
+    {at: 0.05},
+    {at: 0.15},
+    {at: 0.25},
+    {at: 0.35},
+    {at: 0.45},
+    {at: 0.5},
+    {at: 0.55},
+    {at: 0.65},
+    {at: 0.75},
+    {at: 0.85},
+    {at: 0.95},
+    {at: 1.05},
+    {at: 1.15},
+  ]
+};
+
+var animateScale = {
+  keyframes: [
+    {scale: '0.1'},
+    {scale: '1'}
+  ],
+  style: `background: peru; margin: 5px;`,
+  markerStyle: '', // No marker. This mustn't affect cc/blink consistency, crbug.com/531290
+  samples: [
+    {at: 0},
+    {at: 0.05},
+    {at: 0.15},
+    {at: 0.25},
+    {at: 0.35},
+    {at: 0.45},
+    {at: 0.5},
+    {at: 0.55},
+    {at: 0.65},
+    {at: 0.75},
+    {at: 0.85},
+    {at: 0.95},
+    {at: 1.05},
+    {at: 1.15},
+  ]
+};
+
+var translateRotateScaleTests = [animateTranslate, animateRotate, animateScale];
+