Remove GarbageCollected support from the bindings

sky/engine/core/editing/Selection.idl

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 19 matching lines @@
 // This is based on the W3C standard HTML Editing APIs
 // https://dvcs.w3.org/hg/editing/raw-file/tip/editing.html#selection
 //
 // FIXME: Fix discrepancies from the standard, especially
 // * unsigned types where should be unsigned
 // * Nullability
 // * RemoveRange(Range range) method
 // http://crbug.com/391673
 [
     ImplementedAs=DOMSelection,
-    WillBeGarbageCollected,
 ] interface Selection {
     readonly attribute Node anchorNode;
     readonly attribute long anchorOffset;
     readonly attribute Node focusNode;
     readonly attribute long focusOffset;
 
     readonly attribute boolean isCollapsed;
     [RaisesException, TypeChecking=Interface] void collapse(Node node, optional long offset = 0);
     [RaisesException] void collapseToStart();
     [RaisesException] void collapseToEnd();
@@ skipping 34 matching lines @@
                                                                                  [Default=Undefined] optional long baseOffset,
                                                                                  [Default=Undefined] optional Node extentNode,
                                                                                  [Default=Undefined] optional long extentOffset);
     [ImplementedAs=collapse, MeasureAs=SelectionSetPosition, RaisesException, TypeChecking=Interface] void setPosition(Node node,
                                                                                                                        optional long offset = 0);
 
     // IE extensions
     // http://msdn.microsoft.com/en-us/library/ms535869(VS.85).aspx
     [MeasureAs=SelectionEmpty] void empty();
 };