refactor folders to make prepare for native pdf parser

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

 #include "SkPdfFileTrailerDictionary_autogen.h"
 
 long SkPdfFileTrailerDictionary::Size() const {
   long ret;
   if (LongFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Size", "", &ret)) return ret;
   // TODO(edisonn): warn about missing required field, assert for known good pdfs
   return 0;
 }
 
 long SkPdfFileTrailerDictionary::Prev() const {
@@ skipping 23 matching lines @@
   // TODO(edisonn): warn about missing required field, assert for known good pdfs
   return NULL;
 }
 
 SkPdfArray* SkPdfFileTrailerDictionary::ID() const {
   SkPdfArray* ret;
   if (ArrayFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "ID", "", &ret)) return ret;
   // TODO(edisonn): warn about missing required field, assert for known good pdfs
   return NULL;
 }