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

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

 // Copyright 2015 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/EphemeralRange.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/Range.h"
 #include "core/dom/Text.h"
@@ skipping 126 matching lines @@
 EphemeralRangeTemplate<Strategy>::Nodes() const {
   return RangeTraversal(start_position_.NodeAsRangeFirstNode(),
                         end_position_.NodeAsRangePastLastNode());
 }
 
 template <typename Strategy>
 EphemeralRangeTemplate<Strategy>
 EphemeralRangeTemplate<Strategy>::RangeOfContents(const Node& node) {
   return EphemeralRangeTemplate<Strategy>(
       PositionTemplate<Strategy>::FirstPositionInNode(node),
-      PositionTemplate<Strategy>::LastPositionInNode(&const_cast<Node&>(node)));
+      PositionTemplate<Strategy>::LastPositionInNode(node));
 }
 
 #if DCHECK_IS_ON()
 template <typename Strategy>
 bool EphemeralRangeTemplate<Strategy>::IsValid() const {
   return start_position_.IsNull() ||
          dom_tree_version_ == start_position_.GetDocument()->DomTreeVersion();
 }
 #else
 template <typename Strategy>
 bool EphemeralRangeTemplate<Strategy>::IsValid() const {
   return true;
 }
 #endif
 
 Range* CreateRange(const EphemeralRange& range) {
   if (range.IsNull())
     return nullptr;
   return Range::Create(range.GetDocument(), range.StartPosition(),
                        range.EndPosition());
 }
 
 template class CORE_TEMPLATE_EXPORT EphemeralRangeTemplate<EditingStrategy>;
 template class CORE_TEMPLATE_EXPORT
     EphemeralRangeTemplate<EditingInFlatTreeStrategy>;
 
 }  // namespace blink