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

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

 /*
  * Copyright (C) 2004, 2008, 2009, 2010 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 159 matching lines @@
   cached_visible_selection_in_dom_tree_ = VisibleSelection();
   cached_visible_selection_in_flat_tree_ = VisibleSelectionInFlatTree();
   cached_visible_selection_in_dom_tree_is_dirty_ = false;
   cached_visible_selection_in_flat_tree_is_dirty_ = false;
 }
 
 static Position ComputePositionForChildrenRemoval(const Position& position,
                                                   ContainerNode& container) {
   Node* node = position.ComputeContainerNode();
   if (container.ContainsIncludingHostElements(*node))
-    return Position::FirstPositionInNode(&container);
+    return Position::FirstPositionInNode(container);
   return position;
 }
 
 void SelectionEditor::NodeChildrenWillBeRemoved(ContainerNode& container) {
   if (selection_.IsNone())
     return;
   const Position old_base = selection_.base_;
   const Position old_extent = selection_.extent_;
   const Position& new_base =
       ComputePositionForChildrenRemoval(old_base, container);
@@ skipping 251 matching lines @@
 DEFINE_TRACE(SelectionEditor) {
   visitor->Trace(frame_);
   visitor->Trace(selection_);
   visitor->Trace(cached_visible_selection_in_dom_tree_);
   visitor->Trace(cached_visible_selection_in_flat_tree_);
   visitor->Trace(cached_range_);
   SynchronousMutationObserver::Trace(visitor);
 }
 
 }  // namespace blink