Move client_native_pixmap_factory.h from ui/ozone/public to ui/gfx

ui/ozone/gl/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("//testing/test.gni")
 
 test("ozone_gl_unittests") {
   sources = [
     "gl_image_ozone_native_pixmap_unittest.cc",
   ]
 
   deps = [
     "//base/test:test_support",
     "//testing/gtest",
     "//ui/gfx",
     "//ui/gl:run_all_unittests",
     "//ui/gl:test_support",
-    "//ui/ozone",
+    "//ui/ozone:platform",
   ]
 
   data_deps = [
     "//third_party/mesa:osmesa",
   ]
 }