SkPDF: in-place font subsetting

src/pdf/SkPDFMetadata.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 "SkMD5.h"
 #include "SkMilestone.h"
 #include "SkPDFMetadata.h"
@@ skipping 150 matching lines @@
     SkASSERT(data == uuid.fData + 16);
     return SkString(buffer, 36);
 }
 #undef HEXIFY
 
 namespace {
 class PDFXMLObject final : public SkPDFObject {
 public:
     PDFXMLObject(SkString xml) : fXML(std::move(xml)) {}
     void emitObject(SkWStream* stream,
-                    const SkPDFObjNumMap& omap,
-                    const SkPDFSubstituteMap& smap) const override {
+                    const SkPDFObjNumMap& omap) const override {
         SkPDFDict dict("Metadata");
         dict.insertName("Subtype", "XML");
         dict.insertInt("Length", fXML.size());
-        dict.emitObject(stream, omap, smap);
+        dict.emitObject(stream, omap);
         static const char streamBegin[] = " stream\n";
         stream->write(streamBegin, strlen(streamBegin));
         // Do not compress this.  The standard requires that a
         // program that does not understand PDF can grep for
         // "<?xpacket" and extracť the entire XML.
         stream->write(fXML.c_str(), fXML.size());
         static const char streamEnd[] = "\nendstream";
         stream->write(streamEnd, strlen(streamEnd));
     }
 
@@ skipping 147 matching lines @@
             templateString, modificationDate.c_str(), creationDate.c_str(),
             creator.c_str(), title.c_str(), subject.c_str(), author.c_str(),
             keywords1.c_str(), documentID.c_str(), instanceID.c_str(),
             producer.c_str(), keywords2.c_str()));
 }
 
 #undef SKPDF_CUSTOM_PRODUCER_KEY
 #undef SKPDF_PRODUCER
 #undef SKPDF_STRING
 #undef SKPDF_STRING_IMPL