SkDocument::setDCTEncoder() for old versions of webkit

src/doc/SkDocument_PDF.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkDocument.h"
 #include "SkPDFCanon.h"
 #include "SkPDFDevice.h"
@@ skipping 313 matching lines @@
                    void (*doneProc)(SkWStream*, bool),
                    SkScalar rasterDpi)
         : SkDocument(stream, doneProc)
         , fRasterDpi(rasterDpi) {}
 
     virtual ~SkDocument_PDF() {
         // subclasses must call close() in their destructors
         this->close();
     }
 
+    void setDCTEncoder(SkData* (*encoder)(const SkPixmap&)) override {
+        fCanon.fEncoder = encoder;
+    }
+
 protected:
     SkCanvas* onBeginPage(SkScalar width, SkScalar height,
                           const SkRect& trimBox) override {
         SkASSERT(!fCanvas.get());
 
         SkISize pageSize = SkISize::Make(
                 SkScalarRoundToInt(width), SkScalarRoundToInt(height));
         SkAutoTUnref<SkPDFDevice> device(
                 SkPDFDevice::Create(pageSize, fRasterDpi, &fCanon));
         fCanvas.reset(new SkCanvas(device.get()));
@@ skipping 47 matching lines @@
 
 SkDocument* SkDocument::CreatePDF(const char path[], SkScalar dpi) {
     SkFILEWStream* stream = new SkFILEWStream(path);
     if (!stream->isValid()) {
         delete stream;
         return nullptr;
     }
     auto delete_wstream = [](SkWStream* stream, bool) { delete stream; };
     return new SkDocument_PDF(stream, delete_wstream, dpi);
 }