[CSS Typed OM] Refactor is2D handling in CSSTransformComponents to match new spec

third_party/WebKit/Source/core/css/cssom/CSSMatrixComponent.idl

Index: third_party/WebKit/Source/core/css/cssom/CSSMatrixComponent.idl
diff --git a/third_party/WebKit/Source/core/css/cssom/CSSMatrixComponent.idl b/third_party/WebKit/Source/core/css/cssom/CSSMatrixComponent.idl
index 7dd2600fbcc79bfc34795eaaa3a7aed3f035b7aa..4ffa517d59c5b9450896febef2413156e148242f 100644
--- a/third_party/WebKit/Source/core/css/cssom/CSSMatrixComponent.idl
+++ b/third_party/WebKit/Source/core/css/cssom/CSSMatrixComponent.idl
@@ -2,12 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-
 // Represents a matrix value in a CSSTransformValue used for properties like
 // "transform".
 // Spec: https://drafts.css-houdini.org/css-typed-om/#cssmatrixcomponent
 [
-    Constructor(DOMMatrixReadOnly matrix),
+    Constructor(DOMMatrixReadOnly matrix,
+        optional CSSMatrixComponentOptions options),
     Exposed=(Window,PaintWorklet),
     RuntimeEnabled=CSSTypedOM
 ] interface CSSMatrixComponent : CSSTransformComponent {