[GeometryInterface] parameter was changed to DOMMatrixReadOnly.

third_party/WebKit/Source/core/dom/DOMMatrixReadOnly.idl

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // https://dev.w3.org/fxtf/geometry/#DOMMatrix
 
 [
     Constructor,
     Constructor(DOMString transformList),
     Constructor(sequence<unrestricted double> numberSequence),
@@ skipping 52 matching lines @@
                      optional unrestricted double rotZ);
     DOMMatrix rotateFromVector(optional unrestricted double x = 0,
                            optional unrestricted double y = 0);
     DOMMatrix rotateAxisAngle(optional unrestricted double x = 0,
                               optional unrestricted double y = 0,
                               optional unrestricted double z = 0,
                               optional unrestricted double angle = 0);
     DOMMatrix skewX(optional unrestricted double sx = 0);
     DOMMatrix skewY(optional unrestricted double sy = 0);
     [RaisesException] DOMMatrix multiply(optional DOMMatrixInit other);
+    [RaisesException] DOMMatrix multiply(DOMMatrixReadOnly other);
     DOMMatrix flipX();
     DOMMatrix flipY();
     DOMMatrix inverse();
 
     DOMPoint transformPoint(optional DOMPointInit point);
     Float32Array toFloat32Array();
     Float64Array toFloat64Array();
     stringifier;
     serializer = { attribute };
 };