Get drag and drop working for win aura.

ui/views/controls/webview/webview.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 13 matching lines @@
       'defines': [
         'WEBVIEW_IMPLEMENTATION',
       ],
       'sources': [
         'web_dialog_view.cc',
         'web_dialog_view.h',
         'webview.cc',
         'webview.h',
         'webview_export.h',
       ],
+      'conditions': [
+        ['OS=="win" and use_aura==1', {
+          'dependencies': [
+            '../../../aura/aura.gyp:aura',
+          ],
+        }],
+      ],
     },
   ],
 }