[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 90422364f8f08295e7adfd64a3e4d6ed0e1b6ea1..e1ac16d43869fbd9067f016a2449a7590e68149c 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_;
 };