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

third_party/WebKit/Source/core/editing/commands/CompositeEditCommand.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 1711 matching lines @@
 
   HTMLBRElement* br = HTMLBRElement::Create(GetDocument());
   // We want to replace this quoted paragraph with an unquoted one, so insert a
   // br to hold the caret before the highest blockquote.
   InsertNodeBefore(br, highest_blockquote, editing_state);
   if (editing_state->IsAborted())
     return false;
 
   GetDocument().UpdateStyleAndLayoutIgnorePendingStylesheets();
 
-  VisiblePosition at_br = VisiblePosition::BeforeNode(br);
+  VisiblePosition at_br = VisiblePosition::BeforeNode(*br);
   // If the br we inserted collapsed, for example:
   //   foo<br><blockquote>...</blockquote>
   // insert a second one.
   if (!IsStartOfParagraph(at_br)) {
     InsertNodeBefore(HTMLBRElement::Create(GetDocument()), br, editing_state);
     if (editing_state->IsAborted())
       return false;
     GetDocument().UpdateStyleAndLayoutIgnorePendingStylesheets();
   }
   SetEndingSelection(SelectionInDOMTree::Builder()
@@ skipping 231 matching lines @@
 
 DEFINE_TRACE(CompositeEditCommand) {
   visitor->Trace(commands_);
   visitor->Trace(starting_selection_);
   visitor->Trace(ending_selection_);
   visitor->Trace(undo_step_);
   EditCommand::Trace(visitor);
 }
 
 }  // namespace blink