Move services code brought in from Mojo to live under //third_party.

mojo/converters/geometry/BUILD.gn

 # 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.
 
 # GYP version: mojo/mojo_converters.gypi:mojo_geometry_lib
 component("geometry") {
   output_name = "mojo_geometry_lib"
 
   public_deps = [
     "//ui/gfx",
   ]
   deps = [
     "//skia",
     "//ui/gfx/geometry",
     "//mojo/environment:chromium",
-    "//mojo/services/geometry/public/interfaces",
     "//third_party/mojo/src/mojo/public/c/system:for_component",
+    "//third_party/mojo_services/src/geometry/public/interfaces",
   ]
 
   defines = [ "MOJO_GEOMETRY_IMPLEMENTATION" ]
 
   sources = [
     "geometry_type_converters.cc",
     "geometry_type_converters.h",
     "mojo_geometry_export.h",
   ]
 }