refactor folders to make prepare for native pdf parser

experimental/PdfViewer/pdfparser/podofo/autogen/SkPdfImageDictionary_autogen.cpp

 #include "SkPdfImageDictionary_autogen.h"
 
 std::string SkPdfImageDictionary::Type() const {
   std::string ret;
   if (NameFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Type", "", &ret)) return ret;
   // TODO(edisonn): warn about missing required field, assert for known good pdfs
   return "";
 }
 
 std::string SkPdfImageDictionary::Subtype() const {
@@ skipping 121 matching lines @@
   // TODO(edisonn): warn about missing required field, assert for known good pdfs
   return NULL;
 }
 
 SkPdfStream* SkPdfImageDictionary::Metadata() const {
   SkPdfStream* ret;
   if (StreamFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Metadata", "", &ret)) return ret;
   // TODO(edisonn): warn about missing required field, assert for known good pdfs
   return NULL;
 }