Implement DOMPoint using v8 extras.

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

Index: third_party/WebKit/Source/core/dom/DOMPointInit.idl
diff --git a/third_party/WebKit/Source/core/dom/DOMPointInit.idl b/third_party/WebKit/Source/core/dom/DOMPointInit.idl
deleted file mode 100644
index 136627f14314eec1cdb7af3b5a2821d19c7eb2cd..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/core/dom/DOMPointInit.idl
+++ /dev/null
@@ -1,12 +0,0 @@
-// 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.
-
-// http://dev.w3.org/fxtf/geometry/#DOMPoint
-
-dictionary DOMPointInit {
-    unrestricted double x = 0;
-    unrestricted double y = 0;
-    unrestricted double z = 0;
-    unrestricted double w = 1;
-};