CSS Animations: Fix flaky test transform-origin-vs-functions.html

third_party/WebKit/LayoutTests/animations/resources/helpers.js

Index: third_party/WebKit/LayoutTests/animations/resources/helpers.js
diff --git a/third_party/WebKit/LayoutTests/animations/resources/helpers.js b/third_party/WebKit/LayoutTests/animations/resources/helpers.js
new file mode 100644
index 0000000000000000000000000000000000000000..fb3c4af075c59aca4c8dc5367eae086b4c629916
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/animations/resources/helpers.js
@@ -0,0 +1,16 @@
+'use strict';
+
+function matricesApproxEqual(actualMatrix, expectedMatrix, epsilon) {
+  const actualNumbers = actualMatrix.split(/[\(\) ,]/);
+  const expectedNumbers = expectedMatrix.split(/[\(\) ,]/);
+  if (actualNumbers.length !== expectedNumbers.length) {
+    return false;
+  }
+  for (var i = 0; i < actualNumbers.length; i++) {
+    if (actualNumbers[i] !== expectedNumbers[i] &&
+        Math.abs(Number(actualNumbers[i]) - Number(expectedNumbers[i])) > epsilon) {
+      return false;
+    }
+  }
+  return true;
+}