Refactor CopyNativeEvent and add events_mac.mm to start implementing stubs

ui/events/events.gyp

 # Copyright 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 65 matching lines @@
         '../gfx/gfx.gyp:gfx',
         '../gfx/gfx.gyp:gfx_geometry',
         'events_base',
       ],
       'defines': [
         'EVENTS_IMPLEMENTATION',
       ],
       'sources': [
         'cocoa/cocoa_event_utils.h',
         'cocoa/cocoa_event_utils.mm',
+        'cocoa/events_mac.mm',
         'event.cc',
         'event.h',
         'event_dispatcher.cc',
         'event_dispatcher.h',
         'event_handler.cc',
         'event_handler.h',
         'event_processor.cc',
         'event_processor.h',
         'event_rewriter.h',
         'event_source.cc',
@@ skipping 51 matching lines @@
         'win/events_win.cc',
         'x/events_x.cc',
         'linux/text_edit_command_auralinux.cc',
         'linux/text_edit_command_auralinux.h',
         'linux/text_edit_key_bindings_delegate_auralinux.cc',
         'linux/text_edit_key_bindings_delegate_auralinux.h',
       ],
       'conditions': [
         # We explicitly enumerate the platforms we _do_ provide native cracking
         # for here.
-        ['OS=="win" or use_x11==1 or use_ozone==1', {
+        ['OS=="win" or OS=="mac" or use_x11==1 or use_ozone==1', {
           'sources!': [
             'events_stub.cc',
           ],
         }],
         ['chromeos==1', {
           'sources!': [
             'linux/text_edit_command_auralinux.cc',
             'linux/text_edit_command_auralinux.h',
             'linux/text_edit_key_bindings_delegate_auralinux.cc',
             'linux/text_edit_key_bindings_delegate_auralinux.h',
@@ skipping 190 matching lines @@
           'variables': {
             'test_suite_name': 'events_unittests',
             'input_shlib_path': '<(SHARED_LIB_DIR)/<(SHARED_LIB_PREFIX)events_unittests<(SHARED_LIB_SUFFIX)',
           },
           'includes': [ '../../build/apk_test.gypi' ],
         },
       ],
     }],
   ],
 }