Remove asMatrix as a JS-exposed method in CSSTransformComponents.

third_party/WebKit/LayoutTests/typedcssom/cssScale.html

Index: third_party/WebKit/LayoutTests/typedcssom/cssScale.html
diff --git a/third_party/WebKit/LayoutTests/typedcssom/cssScale.html b/third_party/WebKit/LayoutTests/typedcssom/cssScale.html
index 45daef7436ab69060535a794de90704f4da11110..82c084d6def356a556bb91751e9a74a169975d18 100644
--- a/third_party/WebKit/LayoutTests/typedcssom/cssScale.html
+++ b/third_party/WebKit/LayoutTests/typedcssom/cssScale.html
@@ -107,14 +107,15 @@ test(() => {
 for (let params of testParams) {
   test(() => {
     var input = params.input;
-    var inputAsMatrix = input.asMatrix();
-    assert_equals(inputAsMatrix.is2D(), input.is2D());
+    var transformValue = new CSSTransformValue([input]);
+    var inputAsMatrix = transformValue.toMatrix();
+    assert_equals(inputAsMatrix.is2D, input.is2D());
 
     var expectedMatrix = input.is2D() ?
         new DOMMatrixReadOnly([input.x, 0, 0, input.y, 0, 0]) :
         new DOMMatrixReadOnly(
           [input.x, 0, 0, 0, 0, input.y, 0, 0, 0, 0, input.z, 0, 0, 0, 0, 1]);
-    assert_matrix_approx_equals(inputAsMatrix.matrix, expectedMatrix, EPSILON);
+    assert_matrix_approx_equals(inputAsMatrix, expectedMatrix, EPSILON);
   }, "asMatrix is constructed correctly for " + params.cssText);
 }