SkPDF: PDFShader code modernized.

src/pdf/SkPDFTypes.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 SkPDFTypes_DEFINED
 #define SkPDFTypes_DEFINED
@@ skipping 313 matching lines @@
     typedef SkPDFObject INHERITED;
 };
 
 /** \class SkPDFStream
 
     This class takes an asset and assumes that it is the only owner of
     the asset's data.  It immediately compresses the asset to save
     memory.
  */
 
-class SkPDFStream : public SkPDFObject {
+class SkPDFStream final : public SkPDFObject {
 
 public:
     /** Create a PDF stream. A Length entry is automatically added to the
      *  stream dictionary.
      *  @param data   The data part of the stream.
      *  @param stream The data part of the stream. */
     explicit SkPDFStream(sk_sp<SkData> data);
     explicit SkPDFStream(std::unique_ptr<SkStreamAsset> stream);
     virtual ~SkPDFStream();
 
@@ skipping 83 matching lines @@
 };
 
 #ifdef SK_PDF_IMAGE_STATS
 extern SkAtomic<int> gDrawImageCalls;
 extern SkAtomic<int> gJpegImageObjects;
 extern SkAtomic<int> gRegularImageObjects;
 extern void SkPDFImageDumpStats();
 #endif // SK_PDF_IMAGE_STATS
 
 #endif