Make VisiblePosition::FirstPositionInNode() to take const Node& instead of Node*

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

 /*
  * Copyright (C) 2005, 2006, 2007, 2008 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 751 matching lines @@
         }
         if (editing_state->IsAborted())
           return;
       }
 
       // If we have a caret selection at the beginning of a cell, we have
       // nothing to do.
       if (enclosing_table_cell &&
           visible_start.DeepEquivalent() ==
               VisiblePosition::FirstPositionInNode(
-                  const_cast<Node*>(enclosing_table_cell))
+                  *const_cast<Node*>(enclosing_table_cell))
                   .DeepEquivalent())
         return;
 
       // If the caret is at the start of a paragraph after a table, move content
       // into the last table cell.
       if (IsStartOfParagraph(visible_start) &&
           TableElementJustBefore(
               PreviousPositionOf(visible_start, kCannotCrossEditingBoundary))) {
         // Unless the caret is just before a table.  We don't want to move a
         // table into the last table cell.
@@ skipping 232 matching lines @@
   }
   NOTREACHED();
   preserves_typing_style_ = false;
 }
 
 bool TypingCommand::IsTypingCommand() const {
   return true;
 }
 
 }  // namespace blink