MacViews: Don't draw custom frame on Mac

chrome/chrome_browser_ui.gypi

 # Copyright 2012 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': {
     # There are two sections of sources:
     # * "Platform"-based sources (OS, toolkit, etc.)
     # * Feature/directory-based sources (e.g., history, printing)
 
@@ skipping 1317 matching lines @@
     'chrome_browser_ui_desktop_linux_sources': [
       'browser/ui/views/app_list/linux/app_list_linux.cc',
       'browser/ui/views/app_list/linux/app_list_linux.h',
       'browser/ui/views/app_list/linux/app_list_service_linux.cc',
       'browser/ui/views/app_list/linux/app_list_service_linux.h',
       'browser/ui/views/first_run_dialog.cc',
       'browser/ui/views/first_run_dialog.h',
       'browser/ui/views/frame/browser_desktop_window_tree_host.h',
       'browser/ui/views/frame/browser_desktop_window_tree_host_x11.cc',
       'browser/ui/views/frame/browser_desktop_window_tree_host_x11.h',
+      'browser/ui/views/frame/desktop_browser_frame_auralinux.cc',
+      'browser/ui/views/frame/desktop_browser_frame_auralinux.h',
       'browser/ui/views/frame/native_browser_frame_factory_auralinux.cc',
       'browser/ui/views/frame/native_browser_frame_factory_desktop_ash.cc',
       'browser/ui/views/javascript_app_modal_dialog_views_x11.cc',
       'browser/ui/views/javascript_app_modal_dialog_views_x11.h',
       'browser/ui/views/status_icons/status_icon_linux_wrapper.cc',
       'browser/ui/views/status_icons/status_icon_linux_wrapper.h',
       'browser/ui/webui/help/version_updater_basic.cc',
       'browser/ui/webui/help/version_updater_basic.h',
     ],
     # Files used on iOS. iOS uses only these files and does not share other
@@ skipping 1839 matching lines @@
           ],
           'sources': [
             '<@(chrome_browser_ui_non_mobile_sources)',
             '<@(chrome_browser_ui_omnibox_non_mobile_sources)',
           ],
         }],
       ],
     },
   ],
 }