[DMC #17.5] Eliminate DocumentMarker and TextMatchMarker copy constructors

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

 /*
  * Copyright (C) 2011 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 151 matching lines @@
                                Color underline_color,
                                bool thick,
                                Color background_color)
     : type_(DocumentMarker::kComposition),
       start_offset_(start_offset),
       end_offset_(end_offset),
       details_(TextCompositionMarkerDetails::Create(underline_color,
                                                     thick,
                                                     background_color)) {}
 
-DocumentMarker::DocumentMarker(const DocumentMarker& marker)
-    : type_(marker.GetType()),
-      start_offset_(marker.StartOffset()),
-      end_offset_(marker.EndOffset()),
-      details_(marker.Details()) {}
-
 Optional<DocumentMarker::MarkerOffsets>
 DocumentMarker::ComputeOffsetsAfterShift(unsigned offset,
                                          unsigned old_length,
                                          unsigned new_length) const {
   MarkerOffsets result;
   result.start_offset = StartOffset();
   result.end_offset = EndOffset();
 
   // algorithm inspired by https://dom.spec.whatwg.org/#concept-cd-replace
   // but with some changes
@@ skipping 77 matching lines @@
           ToTextCompositionMarkerDetails(details_.Get()))
     return details->BackgroundColor();
   return Color::kTransparent;
 }
 
 DEFINE_TRACE(DocumentMarker) {
   visitor->Trace(details_);
 }
 
 }  // namespace blink