Implement rotate*() methods in DOMMatrix.

Source/core/dom/DOMMatrix.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.
 
 [
     Constructor,
     Constructor(DOMMatrixReadOnly other),
     // FIXME: Should implement more constructors (See: crbug.com/388780)
     RuntimeEnabled=GeometryInterfaces,
 ] interface DOMMatrix : DOMMatrixReadOnly {
@@ skipping 33 matching lines @@
     DOMMatrix scale3dSelf(unrestricted double scale,
                           optional unrestricted double ox = 0,
                           optional unrestricted double oy = 0,
                           optional unrestricted double oz = 0);
     DOMMatrix scaleNonUniformSelf(unrestricted double sx,
                                   optional unrestricted double sy = 1,
                                   optional unrestricted double sz = 1,
                                   optional unrestricted double ox = 0,
                                   optional unrestricted double oy = 0,
                                   optional unrestricted double oz = 0);
+    DOMMatrix rotateSelf(unrestricted double angle,
+                         optional unrestricted double ox = 0,
+                         optional unrestricted double oy = 0);
+    DOMMatrix rotateFromVectorSelf(unrestricted double x,
+                                   unrestricted double y);
+    DOMMatrix rotateAxisAngleSelf(unrestricted double x,
+                                  unrestricted double y,
+                                  unrestricted double z,
+                                  unrestricted double angle);
 };