Simplify the download build rules for Mac.

chrome/chrome.gyp

 # Copyright (c) 2009 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,
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
     # the link of the actual chrome (or chromium) executable on
@@ skipping 1782 matching lines @@
               ],
             }],
           ],
         }],
         ['OS=="linux" and toolkit_views==0', {
           'sources!': [
             'browser/bookmarks/bookmark_drop_info.cc',
           ],
         }],
         ['OS=="mac"', {
-          'sources/': [
-            # Exclude most of download.
-            ['exclude', '^browser/download/'],
-            ['include', '^browser/download/download_(file|manager|shelf|util)\\.cc$'],
-            ['include', '^browser/download/download_request_manager\\.cc$'],
-            ['include', '^browser/download/download_item_model\\.cc$'],
-            ['include', '^browser/download/save_(file(_manager)?|item|package)\\.cc$'],
-          ],
           'sources!': [
             'browser/automation/automation_provider_list_generic.cc',
             'browser/bookmarks/bookmark_context_menu.cc',
             'browser/bookmarks/bookmark_drop_info.cc',
             'browser/dock_info.cc',
+            'browser/download/download_exe.cc',
+            'browser/download/download_request_dialog_delegate_win.cc',
             'browser/login_prompt.cc',
             'browser/password_manager/password_store_gnome.h',
             'browser/password_manager/password_store_gnome.cc',
             'browser/password_manager/password_store_kwallet.h',
             'browser/password_manager/password_store_kwallet.cc',
             'browser/password_manager/password_store_win.cc',
             'browser/password_manager/password_store_win.h',
             'browser/views/extensions/extension_shelf.cc',
             'browser/views/extensions/extension_shelf.h',
             'browser/views/extensions/extension_view.cc',
@@ skipping 3030 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],
   ],  # 'conditions'
 }