Make VisiblePosition::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 531 matching lines @@
 // ---------
 
 VisiblePosition StartOfBlock(const VisiblePosition& visible_position,
                              EditingBoundaryCrossingRule rule) {
   DCHECK(visible_position.IsValid()) << visible_position;
   Position position = visible_position.DeepEquivalent();
   Element* start_block =
       position.ComputeContainerNode()
           ? EnclosingBlock(position.ComputeContainerNode(), rule)
           : 0;
-  return start_block ? VisiblePosition::FirstPositionInNode(start_block)
+  return start_block ? VisiblePosition::FirstPositionInNode(*start_block)
                      : VisiblePosition();
 }
 
 VisiblePosition EndOfBlock(const VisiblePosition& visible_position,
                            EditingBoundaryCrossingRule rule) {
   DCHECK(visible_position.IsValid()) << visible_position;
   Position position = visible_position.DeepEquivalent();
   Element* end_block =
       position.ComputeContainerNode()
           ? EnclosingBlock(position.ComputeContainerNode(), rule)
@@ skipping 73 matching lines @@
 // ---------
 
 VisiblePosition StartOfEditableContent(
     const VisiblePosition& visible_position) {
   DCHECK(visible_position.IsValid()) << visible_position;
   ContainerNode* highest_root =
       HighestEditableRoot(visible_position.DeepEquivalent());
   if (!highest_root)
     return VisiblePosition();
 
-  return VisiblePosition::FirstPositionInNode(highest_root);
+  return VisiblePosition::FirstPositionInNode(*highest_root);
 }
 
 VisiblePosition EndOfEditableContent(const VisiblePosition& visible_position) {
   DCHECK(visible_position.IsValid()) << visible_position;
   ContainerNode* highest_root =
       HighestEditableRoot(visible_position.DeepEquivalent());
   if (!highest_root)
     return VisiblePosition();
 
   return VisiblePosition::LastPositionInNode(highest_root);
@@ skipping 1418 matching lines @@
 
 IntRect ComputeTextRect(const EphemeralRangeInFlatTree& range) {
   return EnclosingIntRect(ComputeTextRectTemplate(range));
 }
 
 FloatRect ComputeTextFloatRect(const EphemeralRange& range) {
   return ComputeTextRectTemplate(range);
 }
 
 }  // namespace blink