Move BaseDropTarget and BaseDragSource from base to app/win. Remove the "Base...

base/base.gypi

 # Copyright (c) 2010 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.
 
 {
   'target_defaults': {
     'variables': {
       'base_target': 0,
       'base_extra_target': 0,
     },
@@ skipping 408 matching lines @@
           'third_party/nss/blapit.h',
           'third_party/nss/sha256.h',
           'third_party/nss/sha512.cc',
           'third_party/purify/pure.h',
           'third_party/purify/pure_api.c',
           'third_party/xdg_user_dirs/xdg_user_dir_lookup.cc',
           'third_party/xdg_user_dirs/xdg_user_dir_lookup.h',
           'auto_reset.h',
           'base64.cc',
           'base64.h',
-          'base_drag_source.cc',
-          'base_drag_source.h',
-          'base_drop_target.cc',
-          'base_drop_target.h',
           'data_pack.cc',
           'event_recorder.cc',
           'event_recorder.h',
           'event_recorder_stubs.cc',
           'file_descriptor_shuffle.cc',
           'file_descriptor_shuffle.h',
           'hmac.h',
           'hmac_mac.cc',
           'hmac_nss.cc',
           'hmac_win.cc',
@@ skipping 308 matching lines @@
             'third_party/xdg_mime/xdgmimemagic.c',
             'third_party/xdg_mime/xdgmimemagic.h',
             'third_party/xdg_mime/xdgmimeparent.c',
             'third_party/xdg_mime/xdgmimeparent.h',
           ],
         },
       ],
     }],
   ],
 }