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

third_party/WebKit/Source/core/editing/VisibleUnits.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 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
@@ skipping 400 matching lines @@
   Node* boundary = ParentEditingBoundary(pos);
   if (!boundary)
     return PositionTemplate<Strategy>();
 
   Document& d = boundary->GetDocument();
   const PositionTemplate<Strategy> start(pos.ParentAnchoredEquivalent());
 
   BackwardsTextBuffer prefix_string;
   if (RequiresContextForWordBoundary(CharacterAfter(c))) {
     SimplifiedBackwardsTextIteratorAlgorithm<Strategy> backwards_iterator(
-        PositionTemplate<Strategy>::FirstPositionInNode(&d), start);
+        PositionTemplate<Strategy>::FirstPositionInNode(d), start);
     while (!backwards_iterator.AtEnd()) {
       backwards_iterator.CopyTextTo(&prefix_string);
       int context_start_index = StartOfLastWordBoundaryContext(
           prefix_string.Data(), backwards_iterator.length());
       if (context_start_index > 0) {
         prefix_string.Shrink(context_start_index);
         break;
       }
       backwards_iterator.Advance();
     }
@@ skipping 151 matching lines @@
 
 template <typename Strategy>
 static VisiblePositionTemplate<Strategy> StartOfDocumentAlgorithm(
     const VisiblePositionTemplate<Strategy>& visible_position) {
   DCHECK(visible_position.IsValid()) << visible_position;
   Node* node = visible_position.DeepEquivalent().AnchorNode();
   if (!node || !node->GetDocument().documentElement())
     return VisiblePositionTemplate<Strategy>();
 
   return CreateVisiblePosition(PositionTemplate<Strategy>::FirstPositionInNode(
-      node->GetDocument().documentElement()));
+      *node->GetDocument().documentElement()));
 }
 
 VisiblePosition StartOfDocument(const VisiblePosition& c) {
   return StartOfDocumentAlgorithm<EditingStrategy>(c);
 }
 
 VisiblePositionInFlatTree StartOfDocument(const VisiblePositionInFlatTree& c) {
   return StartOfDocumentAlgorithm<EditingInFlatTreeStrategy>(c);
 }
 
@@ skipping 1471 matching lines @@
 
 IntRect ComputeTextRect(const EphemeralRangeInFlatTree& range) {
   return EnclosingIntRect(ComputeTextRectTemplate(range));
 }
 
 FloatRect ComputeTextFloatRect(const EphemeralRange& range) {
   return ComputeTextRectTemplate(range);
 }
 
 }  // namespace blink