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

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

 /*
  * Copyright (C) 2005, 2006, 2008, 2009 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 1555 matching lines @@
   SplitTextNode(text, end.OffsetInContainerNode());
 
   Node* prev_node = text->previousSibling();
   if (!prev_node || !prev_node->IsTextNode())
     return;
 
   Position new_start =
       should_update_start
           ? Position(ToText(prev_node), start.OffsetInContainerNode())
           : start;
-  UpdateStartEnd(new_start, Position::LastPositionInNode(prev_node));
+  UpdateStartEnd(new_start, Position::LastPositionInNode(*prev_node));
 }
 
 void ApplyStyleCommand::SplitTextElementAtStart(const Position& start,
                                                 const Position& end) {
   DCHECK(start.ComputeContainerNode()->IsTextNode()) << start;
 
   Position new_end;
   if (start.ComputeContainerNode() == end.ComputeContainerNode())
     new_end =
         Position(end.ComputeContainerNode(),
@@ skipping 459 matching lines @@
 
 DEFINE_TRACE(ApplyStyleCommand) {
   visitor->Trace(style_);
   visitor->Trace(start_);
   visitor->Trace(end_);
   visitor->Trace(styled_inline_element_);
   CompositeEditCommand::Trace(visitor);
 }
 
 }  // namespace blink