browser-plugin: Allow accepting drag-n-drop events.

content/content_common.gypi

 # Copyright (c) 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../build/temp_gyp/googleurl.gyp:googleurl',
     '../media/media.gyp:media',
     '../net/net.gyp:net',
@@ skipping 146 matching lines @@
     'common/db_message_filter.cc',
     'common/db_message_filter.h',
     'common/debug_flags.cc',
     'common/debug_flags.h',
     'common/desktop_notification_messages.h',
     'common/device_motion_messages.h',
     'common/device_orientation_messages.h',
     'common/devtools_messages.h',
     'common/dom_storage_messages.h',
     'common/drag_messages.h',
+    'common/drag_traits.h',
     'common/edit_command.h',
     'common/fileapi/file_system_dispatcher.cc',
     'common/fileapi/file_system_dispatcher.h',
     'common/fileapi/file_system_messages.h',
     'common/fileapi/webblob_messages.h',
     'common/fileapi/webblobregistry_impl.cc',
     'common/fileapi/webblobregistry_impl.h',
     'common/fileapi/webfilesystem_callback_dispatcher.cc',
     'common/fileapi/webfilesystem_callback_dispatcher.h',
     'common/fileapi/webfilesystem_impl.cc',
@@ skipping 377 matching lines @@
         '../build/extract_from_cab.py',
         '..\\third_party\\directxsdk\\files\\Redist\\<(input)',
         '<(output)',
         '<(PRODUCT_DIR)',
         ],
       },
      ]
     }],
   ],
 }