Fix dragging text inside a input element nested in a draggable element.

Source/core/page/DragActions.h

 /*
  * Copyright (C) 2007, 2012 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 21 matching lines @@
 
     // WebCoreDragDestinationAction should be kept in sync with WebDragDestinationAction
     typedef enum {
         DragDestinationActionNone    = 0,
         DragDestinationActionDHTML   = 1,
         DragDestinationActionEdit    = 2,
         DragDestinationActionLoad    = 4,
         DragDestinationActionAny     = UINT_MAX
     } DragDestinationAction;
 
-    // WebCoreDragSourceAction should be kept in sync with WebDragSourceAction
     typedef enum {
-        DragSourceActionNone         = 0,
-        DragSourceActionDHTML        = 1,
-        DragSourceActionImage        = 2,
-        DragSourceActionLink         = 4,
-        DragSourceActionSelection    = 8,
+        DragSourceActionNone,
+        DragSourceActionDHTML,
+        DragSourceActionImage,
+        DragSourceActionLink,
+        DragSourceActionSelection,
     } DragSourceAction;
 
     //matches NSDragOperation
     typedef enum {
         DragOperationNone    = 0,
         DragOperationCopy    = 1,
         DragOperationLink    = 2,
         DragOperationGeneric = 4,
         DragOperationPrivate = 8,
         DragOperationMove    = 16,
         DragOperationDelete  = 32,
         DragOperationEvery   = UINT_MAX
     } DragOperation;
 
 }
 
 #endif // !DragActions_h