Move geometry interface files to geometry directory.

third_party/WebKit/Source/core/dom/DOMPointReadOnly.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://drafts.fxtf.org/geometry/#dompointreadonly
-
-[
-    Constructor(optional unrestricted double x = 0, optional unrestricted double y = 0,
-                optional unrestricted double z = 0, optional unrestricted double w = 1),
-    Exposed=(Window,Worker),
-    RuntimeEnabled=GeometryInterfaces,
-] interface DOMPointReadOnly {
-    [NewObject] static DOMPointReadOnly fromPoint(optional DOMPointInit other);
-
-    readonly attribute unrestricted double x;
-    readonly attribute unrestricted double y;
-    readonly attribute unrestricted double z;
-    readonly attribute unrestricted double w;
-
-    [RaisesException] DOMPoint matrixTransform(optional DOMMatrixInit matrix);
-
-    serializer = { attribute };
-};