Extract helper function.

third_party/WebKit/Source/core/layout/svg/line/SVGInlineTextBox.h

Index: third_party/WebKit/Source/core/layout/svg/line/SVGInlineTextBox.h
diff --git a/third_party/WebKit/Source/core/layout/svg/line/SVGInlineTextBox.h b/third_party/WebKit/Source/core/layout/svg/line/SVGInlineTextBox.h
index 2e28c1d1b7c07c0ef66c6e5a2e7e5b3a81cee5ed..6a7337965807f90ba23d7887aa0eb91bd8bab3f6 100644
--- a/third_party/WebKit/Source/core/layout/svg/line/SVGInlineTextBox.h
+++ b/third_party/WebKit/Source/core/layout/svg/line/SVGInlineTextBox.h
@@ -79,18 +79,18 @@ class SVGInlineTextBox final : public InlineTextBox {
  private:
   void paintDocumentMarker(GraphicsContext&,
                            const LayoutPoint&,
-                           DocumentMarker*,
+                           const DocumentMarker&,
                            const ComputedStyle&,
                            const Font&,
                            bool) const final;
   void paintTextMatchMarkerForeground(const PaintInfo&,
                                       const LayoutPoint&,
-                                      DocumentMarker*,
+                                      const DocumentMarker&,
                                       const ComputedStyle&,
                                       const Font&) const final;
   void paintTextMatchMarkerBackground(const PaintInfo&,
                                       const LayoutPoint&,
-                                      DocumentMarker*,
+                                      const DocumentMarker&,
                                       const ComputedStyle&,
                                       const Font&) const final;