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

third_party/WebKit/Source/core/editing/spellcheck/ColdModeSpellCheckRequester.cpp

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/editing/spellcheck/ColdModeSpellCheckRequester.h"
 
 #include "core/dom/Element.h"
 #include "core/dom/IdleDeadline.h"
 #include "core/editing/EditingUtilities.h"
 #include "core/editing/VisibleUnits.h"
@@ skipping 131 matching lines @@
   if (current_full_length_ <= kColdModeChunkSize) {
     GetSpellCheckRequester().RequestCheckingFor(
         EphemeralRange::RangeOfContents(*current_root_editable_));
     FinishCheckingCurrentRootEditable();
     return;
   }
 
   const Position& chunk_end =
       CalculateCharacterSubrange(
           EphemeralRange(current_chunk_start_,
-                         Position::LastPositionInNode(current_root_editable_)),
+                         Position::LastPositionInNode(*current_root_editable_)),
           0, kColdModeChunkSize)
           .EndPosition();
   if (chunk_end <= current_chunk_start_) {
     FinishCheckingCurrentRootEditable();
     return;
   }
   const EphemeralRange chunk_range(current_chunk_start_, chunk_end);
   const EphemeralRange& check_range = ExpandEndToSentenceBoundary(chunk_range);
   GetSpellCheckRequester().RequestCheckingFor(check_range,
                                               current_chunk_index_);
@@ skipping 10 matching lines @@
   next_node_ = FlatTreeTraversal::NextSkippingChildren(
       *next_node_, GetFrame().GetDocument()->body());
 
   current_root_editable_ = nullptr;
   current_full_length_ = kInvalidLength;
   current_chunk_index_ = kInvalidChunkIndex;
   current_chunk_start_ = Position();
 }
 
 }  // namespace blink