[GeometryInterface] Implement DOMQuad and DOMQuadInit.

third_party/WebKit/Source/core/dom/BUILD.gn

 # Copyright 2016 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.
 
 import("//third_party/WebKit/Source/core/core.gni")
 
 blink_core_sources("dom") {
   split_count = 5
 
   sources = [
@@ skipping 47 matching lines @@
     "DOMMatrix.cpp",
     "DOMMatrix.h",
     "DOMMatrixReadOnly.cpp",
     "DOMMatrixReadOnly.h",
     "DOMNodeIds.cpp",
     "DOMNodeIds.h",
     "DOMPoint.cpp",
     "DOMPoint.h",
     "DOMPointReadOnly.cpp",
     "DOMPointReadOnly.h",
+    "DOMQuad.cpp",
+    "DOMQuad.h",
     "DOMRect.cpp",
     "DOMRect.h",
     "DOMRectReadOnly.cpp",
     "DOMRectReadOnly.h",
     "DOMSharedArrayBuffer.cpp",
     "DOMSharedArrayBuffer.h",
     "DOMStringList.cpp",
     "DOMStringList.h",
     "DOMStringMap.cpp",
     "DOMStringMap.h",
@@ skipping 312 matching lines @@
     "shadow/SlotAssignment.h",
     "shadow/SlotScopedTraversal.cpp",
     "shadow/SlotScopedTraversal.h",
   ]
 
   configs += [
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
 }