Merge 91797 - Add support for download='filename' attribute in anchors.

Source/WebKit/chromium/features.gypi

 #
 # Copyright (C) 2009 Google Inc. All rights reserved.
 # 
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 # 
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 26 matching lines @@
       'ENABLE_BLOB_SLICE=1',
       'ENABLE_CHANNEL_MESSAGING=1',
       'ENABLE_CLIENT_BASED_GEOLOCATION=1',
       'ENABLE_DASHBOARD_SUPPORT=0',
       'ENABLE_DATABASE=1',
       'ENABLE_DATA_TRANSFER_ITEMS=1',
       'ENABLE_DETAILS=1',
       'ENABLE_DEVICE_ORIENTATION=1',
       'ENABLE_DIRECTORY_UPLOAD=1',
       'ENABLE_DOM_STORAGE=1',
+      'ENABLE_DOWNLOAD_ATTRIBUTE=1',
       'ENABLE_EVENTSOURCE=1',
       'ENABLE_JAVASCRIPT_I18N_API=1',
       'ENABLE_FILE_SYSTEM=1',
       'ENABLE_FILTERS=1',
       'ENABLE_GEOLOCATION=1',
       'ENABLE_GESTURE_RECOGNIZER=1',
       'ENABLE_ICONDATABASE=0',
       'ENABLE_INDEXED_DATABASE=1',
       'ENABLE_INPUT_SPEECH=1',
       'ENABLE_JAVASCRIPT_DEBUGGER=1',
@@ skipping 103 matching lines @@
         ],
       }],
       ['enable_css3_flexbox==1', {
         'feature_defines': [
           'ENABLE_CSS3_FLEXBOX=1',
         ],
       }],
     ],
   },
 }