DM: PDFSink sets rasterizer keyword

dm/DMSrcSink.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "DMSrcSink.h"
 #include "SamplePipeControllers.h"
 #include "SkCodec.h"
@@ skipping 906 matching lines @@
         }
         doc->endPage();
     }
     if (!doc->close()) {
         return "SkDocument::close() returned false";
     }
     dst->flush();
     return "";
 }
 
-PDFSink::PDFSink() {}
+PDFSink::PDFSink(const char* rasterizer) : fRasterizer(rasterizer) {}
 
 Error PDFSink::draw(const Src& src, SkBitmap*, SkWStream* dst, SkString*) const {
     SkAutoTUnref<SkDocument> doc(SkDocument::CreatePDF(dst));
     if (!doc) {
         return "SkDocument::CreatePDF() returned nullptr";
     }
     SkTArray<SkDocument::Attribute> info;
     info.emplace_back(SkString("Title"), src.name());
     info.emplace_back(SkString("Subject"),
                       SkString("rendering correctness test"));
     info.emplace_back(SkString("Creator"), SkString("Skia/DM"));
+
+    info.emplace_back(SkString("Keywords"),
+                      SkStringPrintf("Rasterizer:%s;", fRasterizer));
     doc->setMetadata(info, nullptr, nullptr);
     return draw_skdocument(src, doc.get(), dst);
 }
 
 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
 
 XPSSink::XPSSink() {}
 
 Error XPSSink::draw(const Src& src, SkBitmap*, SkWStream* dst, SkString*) const {
     SkAutoTUnref<SkDocument> doc(SkDocument::CreateXPS(dst));
@@ skipping 319 matching lines @@
             skr.visit<void>(i, drawsAsSingletonPictures);
         }
         SkAutoTUnref<SkPicture> macroPic(macroRec.endRecordingAsPicture());
 
         canvas->drawPicture(macroPic);
         return "";
     });
 }
 
 }  // namespace DM