Make Position::LastPositionInNode() to take const Node& instead of Node*

third_party/WebKit/Source/core/editing/commands/InsertTextCommand.cpp

 /*
  * Copyright (C) 2005 Apple Computer, 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 317 matching lines @@
       // insert the span before it.
       if (offset > 0)
         SplitTextNode(text_node, offset);
       InsertNodeBefore(span_element, text_node, editing_state);
     }
   }
   if (editing_state->IsAborted())
     return Position();
 
   // return the position following the new tab
-  return Position::LastPositionInNode(span_element);
+  return Position::LastPositionInNode(*span_element);
 }
 
 }  // namespace blink