Geometry: Reimplement DOMPoint using V8 extras.

third_party/WebKit/Source/modules/vr/VRPositionState.idl

 // Copyright 2015 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.
 
 // http://mozvr.github.io/webvr-spec/webvr.html#vrpositionstate
 [
     RuntimeEnabled=WebVR,
     GarbageCollected,
 ] interface VRPositionState {
     readonly attribute double timeStamp;
-    readonly attribute DOMPoint? position;
-    readonly attribute DOMPoint? linearVelocity;
-    readonly attribute DOMPoint? linearAcceleration;
-    readonly attribute DOMPoint? orientation;
-    readonly attribute DOMPoint? angularVelocity;
-    readonly attribute DOMPoint? angularAcceleration;
+
+    // The spec says that the following values should be DOMPoint? but for now
+    // we use 'any' instead since it is implemented with V8 extras.
+    // Please see: http://crbug.com/588630
+    readonly attribute any position;
+    readonly attribute any linearVelocity;
+    readonly attribute any linearAcceleration;
+    readonly attribute any orientation;
+    readonly attribute any angularVelocity;
+    readonly attribute any angularAcceleration;
 };