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

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

 // Copyright 2016 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/SpellChecker.h"
 
 #include "core/editing/Editor.h"
 #include "core/editing/markers/DocumentMarkerController.h"
 #include "core/editing/markers/SpellCheckMarker.h"
 #include "core/editing/spellcheck/SpellCheckRequester.h"
@@ skipping 47 matching lines @@
   GetSpellChecker().AdvanceToNextMisspelling(false);
 }
 
 // Regression test for crbug.com/728801
 TEST_F(SpellCheckerTest, AdvancedToNextMisspellingWrapSearchNoCrash) {
   SetBodyContent("<div contenteditable>  zz zz zz  </div>");
 
   Element* div = GetDocument().QuerySelector("div");
   div->focus();
   Selection().SetSelection(SelectionInDOMTree::Builder()
-                               .Collapse(Position::LastPositionInNode(div))
+                               .Collapse(Position::LastPositionInNode(*div))
                                .Build());
   UpdateAllLifecyclePhases();
 
   GetSpellChecker().AdvanceToNextMisspelling(false);
 }
 
 TEST_F(SpellCheckerTest, SpellCheckDoesNotCauseUpdateLayout) {
   SetBodyContent("<input>");
   HTMLInputElement* input =
       toHTMLInputElement(GetDocument().QuerySelector("input"));
@@ skipping 294 matching lines @@
 
   Optional<std::pair<Node*, SpellCheckMarker*>> result =
       GetDocument()
           .GetFrame()
           ->GetSpellChecker()
           .GetSpellCheckMarkerTouchingSelection();
   EXPECT_FALSE(result);
 }
 
 }  // namespace blink