DM/PDF: stop adding unused rasterizer keywords

dm/DMSrcSink.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef DMSrcSink_DEFINED
 #define DMSrcSink_DEFINED
 
@@ skipping 235 matching lines @@
     sk_gpu_test::GrContextFactory::GLContextOptions fContextOptions;
     int                                             fSampleCount;
     bool                                            fUseDIText;
     SkColorType                                     fColorType;
     SkColorProfileType                              fProfileType;
     bool                                            fThreaded;
 };
 
 class PDFSink : public Sink {
 public:
-    PDFSink(const char* rasterizer);
-
     Error draw(const Src&, SkBitmap*, SkWStream*, SkString*) const override;
     const char* fileExtension() const override { return "pdf"; }
     SinkFlags flags() const override { return SinkFlags{ SinkFlags::kVector, SinkFlags::kDirect }; }
-private:
-    const char* fRasterizer;
 };
 
 class XPSSink : public Sink {
 public:
     XPSSink();
 
     Error draw(const Src&, SkBitmap*, SkWStream*, SkString*) const override;
     const char* fileExtension() const override { return "xps"; }
     SinkFlags flags() const override { return SinkFlags{ SinkFlags::kVector, SinkFlags::kDirect }; }
 };
@@ skipping 102 matching lines @@
 
 class ViaMojo : public Via {
 public:
     explicit ViaMojo(Sink* sink) : Via(sink) {}
     Error draw(const Src&, SkBitmap*, SkWStream*, SkString*) const override;
 };
 
 }  // namespace DM
 
 #endif//DMSrcSink_DEFINED