SkPDF: add `final` keyword to leaf classes
Review URL: https://codereview.chromium.org/1461403002
diff --git a/src/pdf/SkPDFGraphicState.h b/src/pdf/SkPDFGraphicState.h
index 45a32d4..d816f72 100644
--- a/src/pdf/SkPDFGraphicState.h
+++ b/src/pdf/SkPDFGraphicState.h
@@ -22,7 +22,7 @@
be installed. So that a given dictionary is only output to the pdf file
once, we want to canonicalize them.
*/
-class SkPDFGraphicState : public SkPDFObject {
+class SkPDFGraphicState final : public SkPDFObject {
public:
enum SkPDFSMaskMode {