Implement flip*() methods in DOMMatrixReaOnly.

LayoutTests/fast/dom/geometry-interfaces-dom-matrix-flip.html

Index: LayoutTests/fast/dom/geometry-interfaces-dom-matrix-flip.html
diff --git a/LayoutTests/fast/dom/geometry-interfaces-dom-matrix-skew.html b/LayoutTests/fast/dom/geometry-interfaces-dom-matrix-flip.html
similarity index 64%
copy from LayoutTests/fast/dom/geometry-interfaces-dom-matrix-skew.html
copy to LayoutTests/fast/dom/geometry-interfaces-dom-matrix-flip.html
index 0db9021b5d3e6b8d35afbc62b2eb60204064e834..9390cbfc4f82872a3fa465375a94591b6fa92016 100644
--- a/LayoutTests/fast/dom/geometry-interfaces-dom-matrix-skew.html
+++ b/LayoutTests/fast/dom/geometry-interfaces-dom-matrix-flip.html
@@ -17,17 +17,14 @@ test(function() {
   matrix.e = 5;
   matrix.f = 6;
   assert_true(matrix.is2D);
-  var result = matrix.skewX(32);
-  var expected = new DOMMatrix();
-  expected.m21 = Math.tan(Math.PI / 180 * 32);
-  expected.preMultiplySelf(matrix);
+  var result = matrix.flipX()
+  var expected = new DOMMatrix(matrix);
+  expected.scaleNonUniformSelf(-1.0);
   assert_true(matrix.is2D);
   assert_false(matrix.isIdentity);
   assert_array_equals(matrix.toFloat64Array(), [ 1, 2, 0, 0, 3, 4, 0, 0, 0, 0, 1, 0, 5, 6, 0, 1 ]);
   assert_array_equals(result.toFloat64Array(), expected.toFloat64Array());
-  matrix.skewXSelf(32);
-  assert_array_equals(matrix.toFloat64Array(), expected.toFloat64Array());
-}, "DOMMatrix.skewX(sx) and DOMMatrix.skewXSelf(sx) for 2D Matrix");
+}, "DOMMatrix.flipX() for 2D Matrix");
 
 test(function() {
   var matrix = new DOMMatrix();
@@ -38,17 +35,14 @@ test(function() {
   matrix.e = 5;
   matrix.f = 6;
   assert_true(matrix.is2D);
-  var result = matrix.skewY(25);
-  var expected = new DOMMatrix();
-  expected.m12 = Math.tan(Math.PI / 180 * 25);
-  expected.preMultiplySelf(matrix);
+  var result = matrix.flipY()
+  var expected = new DOMMatrix(matrix);
+  expected.scaleNonUniformSelf(1.0, -1.0);
   assert_true(matrix.is2D);
   assert_false(matrix.isIdentity);
   assert_array_equals(matrix.toFloat64Array(), [ 1, 2, 0, 0, 3, 4, 0, 0, 0, 0, 1, 0, 5, 6, 0, 1 ]);
   assert_array_equals(result.toFloat64Array(), expected.toFloat64Array());
-  matrix.skewYSelf(25);
-  assert_array_equals(matrix.toFloat64Array(), expected.toFloat64Array());
-}, "DOMMatrix.skewY(sy) and DOMMatrix.skewYSelf(sy) for 2D Matrix");
+}, "DOMMatrix.flipY() for 2D Matrix");
 
 test(function() {
   var matrix = new DOMMatrix();
@@ -69,17 +63,14 @@ test(function() {
   matrix.m43 = 15;
   matrix.m44 = 16;
   assert_false(matrix.is2D);
-  var result = matrix.skewX(32);
-  var expected = new DOMMatrix();
-  expected.m21 = Math.tan(Math.PI / 180 * 32);
-  expected.preMultiplySelf(matrix);
+  var result = matrix.flipX()
+  var expected = new DOMMatrix(matrix);
+  expected.scaleNonUniformSelf(-1.0);
   assert_false(matrix.is2D);
   assert_false(matrix.isIdentity);
   assert_array_equals(matrix.toFloat64Array(), [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 ]);
   assert_array_equals(result.toFloat64Array(), expected.toFloat64Array());
-  matrix.skewXSelf(32);
-  assert_array_equals(matrix.toFloat64Array(), expected.toFloat64Array());
-}, "DOMMatrix.skewX(sx) and DOMMatrix.skewXSelf(sx) for 3D Matrix");
+}, "DOMMatrix.flipX() for 3D Matrix");
 
 test(function() {
   var matrix = new DOMMatrix();
@@ -100,17 +91,14 @@ test(function() {
   matrix.m43 = 15;
   matrix.m44 = 16;
   assert_false(matrix.is2D);
-  var result = matrix.skewY(25);
-  var expected = new DOMMatrix();
-  expected.m12 = Math.tan(Math.PI / 180 * 25);
-  expected.preMultiplySelf(matrix);
+  var result = matrix.flipY()
+  var expected = new DOMMatrix(matrix);
+  expected.scaleNonUniformSelf(1.0, -1.0);
   assert_false(matrix.is2D);
   assert_false(matrix.isIdentity);
   assert_array_equals(matrix.toFloat64Array(), [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 ]);
   assert_array_equals(result.toFloat64Array(), expected.toFloat64Array());
-  matrix.skewYSelf(25);
-  assert_array_equals(matrix.toFloat64Array(), expected.toFloat64Array());
-}, "DOMMatrix.skewY(sy) and DOMMatrix.skewYSelf(sy) for 3D Matrix");
+}, "DOMMatrix.flipY() for 3D Matrix");
 
 </script>
 </body>