Remove unused DocumentMarker comparison operators

third_party/WebKit/Source/core/editing/markers/DocumentMarker.h

 /*
  * This file is part of the DOM implementation for WebCore.
  *
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 162 matching lines @@
   Optional<MarkerOffsets> ComputeOffsetsAfterShift(unsigned offset,
                                                    unsigned old_length,
                                                    unsigned new_length) const;
 
   // Offset modifications are done by DocumentMarkerController.
   // Other classes should not call following setters.
   void SetStartOffset(unsigned offset) { start_offset_ = offset; }
   void SetEndOffset(unsigned offset) { end_offset_ = offset; }
   void ShiftOffsets(int delta);
 
-  bool operator==(const DocumentMarker& o) const {
-    return GetType() == o.GetType() && StartOffset() == o.StartOffset() &&
-           EndOffset() == o.EndOffset();
-  }
-
-  bool operator!=(const DocumentMarker& o) const { return !(*this == o); }
-
   DECLARE_TRACE();
 
  private:
   MarkerType type_;
   unsigned start_offset_;
   unsigned end_offset_;
   Member<DocumentMarkerDetails> details_;
 };
 
 using DocumentMarkerVector = HeapVector<Member<DocumentMarker>>;
@@ skipping 10 matching lines @@
   virtual bool IsDescription() const { return false; }
   virtual bool IsTextMatch() const { return false; }
   virtual bool IsComposition() const { return false; }
 
   DEFINE_INLINE_VIRTUAL_TRACE() {}
 };
 
 }  // namespace blink
 
 #endif  // DocumentMarker_h