Add "Paste as plain text" into text selection toolbar overflow

third_party/WebKit/public/web/WebContextMenuData.h

 /*
  * Copyright (C) 2009, 2012 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 159 matching lines @@
   enum EditFlags {
     kCanDoNone = 0x0,
     kCanUndo = 0x1,
     kCanRedo = 0x2,
     kCanCut = 0x4,
     kCanCopy = 0x8,
     kCanPaste = 0x10,
     kCanDelete = 0x20,
     kCanSelectAll = 0x40,
     kCanTranslate = 0x80,
+    kCanEditRichly = 0x100,
   };
 
   // Which edit operations are available in the context.
   int edit_flags;
 
   // The referrer policy applicable to this context.
   WebReferrerPolicy referrer_policy;
 
   // Custom context menu items provided by the WebCore internals.
   WebVector<WebMenuItemInfo> custom_items;
 
   WebContextMenuData()
       : media_type(kMediaTypeNone),
         has_image_contents(false),
         media_flags(kMediaNone),
         is_spell_checking_enabled(false),
         is_editable(false),
         writing_direction_default(kCheckableMenuItemDisabled),
         writing_direction_left_to_right(kCheckableMenuItemEnabled),
         writing_direction_right_to_left(kCheckableMenuItemEnabled),
         edit_flags(0) {}
 };
 
 }  // namespace blink
 
 #endif