refactoring for pdf viewer lib

experimental/PdfViewer/autogen/SkPdfListAttributeDictionary_autogen.h

 #ifndef __DEFINED__SkPdfListAttributeDictionary
 #define __DEFINED__SkPdfListAttributeDictionary
 
 #include "SkPdfUtils.h"
 #include "SkPdfEnums_autogen.h"
 #include "SkPdfArray_autogen.h"
 #include "SkPdfDictionary_autogen.h"
 
 // Standard list attribute
 class SkPdfListAttributeDictionary : public SkPdfDictionary {
@@ skipping 530 matching lines @@
  *  Default value: None.
  *  Note: The alphabet used for UpperAlpha and LowerAlpha is determined by the pre-
  *  vailing Lang entry (see Section 9.8.1, "Natural Language Specification").
  *  Note: The set of possible values may be expanded as Unicode identifies additional
  *  numbering systems.
 **/
   bool has_ListNumbering() const {
     return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "ListNumbering", "", NULL));
   }
 
-  std::string ListNumbering() const {
-    std::string ret;
-    if (NameFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "ListNumbering", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return "";
-  }
-
+  std::string ListNumbering() const;
 };
 
 #endif  // __DEFINED__SkPdfListAttributeDictionary