SkPDF: add `final` keyword to leaf classes

src/pdf/SkPDFGraphicState.h

 
 /*
  * Copyright 2010 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkPDFGraphicState_DEFINED
 #define SkPDFGraphicState_DEFINED
 
 #include "SkPaint.h"
 #include "SkPDFTypes.h"
 #include "SkChecksum.h"
 
 class SkPDFCanon;
 class SkPDFFormXObject;
 
 /** \class SkPDFGraphicState
     SkPaint objects roughly correspond to graphic state dictionaries that can
     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 {
         kAlpha_SMaskMode,
         kLuminosity_SMaskMode
     };
 
     // Override emitObject so that we can populate the dictionary on
     // demand.
     void emitObject(SkWStream* stream,
@@ skipping 45 matching lines @@
     const uint8_t fStrokeCap;   // SkPaint::Cap
     const uint8_t fStrokeJoin;  // SkPaint::Join
     const uint8_t fMode;        // SkXfermode::Mode
 
     SkPDFGraphicState(const SkPaint&);
 
     typedef SkPDFDict INHERITED;
 };
 
 #endif