Refactor CopyNativeEvent and add events_mac.mm to start implementing stubs

ui/gfx/gfx.gyp

 # Copyright (c) 2013 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 178 matching lines @@
         'image/image_skia_util_ios.mm',
         'image/image_skia_util_mac.h',
         'image/image_skia_util_mac.mm',
         'image/image_util.cc',
         'image/image_util.h',
         'image/image_util_ios.mm',
         'interpolated_transform.cc',
         'interpolated_transform.h',
         'linux_font_delegate.cc',
         'linux_font_delegate.h',
+        'mac/point_utils.h',
+        'mac/point_utils.mm',
         'mac/scoped_ns_disable_screen_updates.h',
         'native_widget_types.h',
         'nine_image_painter.cc',
         'nine_image_painter.h',
         'overlay_transform.h',
         'ozone/dri/dri_buffer.cc',
         'ozone/dri/dri_buffer.h',
         'ozone/dri/dri_surface.cc',
         'ozone/dri/dri_surface.h',
         'ozone/dri/dri_surface_factory.cc',
@@ skipping 338 matching lines @@
           ],
           'variables': {
             'test_suite_name': 'gfx_unittests',
           },
           'includes': [ '../../build/apk_test.gypi' ],
         },
       ],
     }],
   ],
 }