[Editing] Add SelectionTemplate::showTreeForThis()

third_party/WebKit/Source/core/editing/VisibleSelection.h

 /*
  * Copyright (C) 2004 Apple Computer, 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 130 matching lines @@
     visitor->trace(m_base);
     visitor->trace(m_extent);
     visitor->trace(m_start);
     visitor->trace(m_end);
   }
 
   void updateIfNeeded();
 
 #ifndef NDEBUG
   void showTreeForThis() const;
+  static void showTreeForStartAndEnd(const PositionTemplate<Strategy>&,
+                                     const PositionTemplate<Strategy>&);
 #endif
   static void PrintTo(const VisibleSelectionTemplate&, std::ostream*);
 
  private:
   friend class SelectionAdjuster;
 
   VisibleSelectionTemplate(const SelectionTemplate<Strategy>&);
 
   void validate(TextGranularity = CharacterGranularity);
 
@@ skipping 62 matching lines @@
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const blink::VisibleSelection&);
 void showTree(const blink::VisibleSelection*);
 void showTree(const blink::VisibleSelectionInFlatTree&);
 void showTree(const blink::VisibleSelectionInFlatTree*);
 #endif
 
 #endif  // VisibleSelection_h