[DMC #17.5] Eliminate DocumentMarker and TextMatchMarker copy constructors

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

Index: third_party/WebKit/Source/core/editing/markers/TextMatchMarker.h
diff --git a/third_party/WebKit/Source/core/editing/markers/TextMatchMarker.h b/third_party/WebKit/Source/core/editing/markers/TextMatchMarker.h
index c6c87b1f0a804113d9acd0893b31a330a2f45dd6..559f1a79047c5c387f67727a6ad36f29325c9338 100644
--- a/third_party/WebKit/Source/core/editing/markers/TextMatchMarker.h
+++ b/third_party/WebKit/Source/core/editing/markers/TextMatchMarker.h
@@ -70,9 +70,6 @@ class TextMatchMarker final : public DocumentMarker {
   bool IsValid() const { return state_ != State::kInvalid; }
 
  private:
-  explicit TextMatchMarker(const DocumentMarker& marker)
-      : DocumentMarker(marker), state_(State::kInvalid) {}
-
   LayoutRect rendered_rect_;
   State state_;
 };