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

third_party/WebKit/Source/core/editing/serializers/Serialization.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2008, 2009, 2010, 2011 Google Inc. All rights reserved.
  * Copyright (C) 2011 Igalia S.L.
  * Copyright (C) 2011 Motorola Mobility. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ skipping 191 matching lines @@
                 FirstPositionInOrBeforeNode(first_node),
                 IsMailHTMLBlockquoteElement, kCanCrossEditingBoundary)))
       special_common_ancestor = highest_mail_blockquote;
   }
 
   Node* check_ancestor =
       special_common_ancestor ? special_common_ancestor : common_ancestor;
   if (check_ancestor->GetLayoutObject()) {
     HTMLElement* new_special_common_ancestor =
         ToHTMLElement(HighestEnclosingNodeOfType(
-            Position::FirstPositionInNode(check_ancestor),
+            Position::FirstPositionInNode(*check_ancestor),
             &IsPresentationalHTMLElement, kCanCrossEditingBoundary,
             constraining_ancestor));
     if (new_special_common_ancestor)
       special_common_ancestor = new_special_common_ancestor;
   }
 
   // If a single tab is selected, commonAncestor will be a text node inside a
   // tab span. If two or more tabs are selected, commonAncestor will be the tab
   // span. In either case, if there is a specialCommonAncestor already, it will
   // necessarily be above any tab span that needs to be included.
   if (!special_common_ancestor && IsTabHTMLSpanElementTextNode(common_ancestor))
     special_common_ancestor =
         toHTMLSpanElement(Strategy::Parent(*common_ancestor));
   if (!special_common_ancestor && IsTabHTMLSpanElement(common_ancestor))
     special_common_ancestor = toHTMLSpanElement(common_ancestor);
 
   if (HTMLAnchorElement* enclosing_anchor =
           toHTMLAnchorElement(EnclosingElementWithTag(
               Position::FirstPositionInNode(special_common_ancestor
-                                                ? special_common_ancestor
-                                                : common_ancestor),
+                                                ? *special_common_ancestor
+                                                : *common_ancestor),
               aTag)))
     special_common_ancestor = enclosing_anchor;
 
   return special_common_ancestor;
 }
 
 template <typename Strategy>
 class CreateMarkupAlgorithm {
  public:
   static String CreateMarkup(
@@ skipping 513 matching lines @@
   text_node->appendData(text_next->data());
   if (text_next->parentNode())  // Might have been removed by mutation event.
     text_next->remove(exception_state);
 }
 
 template class CORE_TEMPLATE_EXPORT CreateMarkupAlgorithm<EditingStrategy>;
 template class CORE_TEMPLATE_EXPORT
     CreateMarkupAlgorithm<EditingInFlatTreeStrategy>;
 
 }  // namespace blink