refactoring for pdf viewer lib

experimental/PdfViewer/autogen/SkPdfOpiVersionDictionary_autogen.h

 #ifndef __DEFINED__SkPdfOpiVersionDictionary
 #define __DEFINED__SkPdfOpiVersionDictionary
 
 #include "SkPdfUtils.h"
 #include "SkPdfEnums_autogen.h"
 #include "SkPdfArray_autogen.h"
 #include "SkPdfDictionary_autogen.h"
 
 // Entry in an OPI version dictionary
 class SkPdfOpiVersionDictionary : public SkPdfDictionary {
@@ skipping 515 matching lines @@
   SkPdfOpiVersionDictionary& operator=(const SkPdfOpiVersionDictionary& from) {this->fPodofoDoc = from.fPodofoDoc; this->fPodofoObj = from.fPodofoObj; return *this;}
 
 /** (Required; PDF 1.2) An OPI dictionary specifying the attributes of this proxy
  *  (see Tables 9.50 and 9.51). The key for this entry must be the name 1.3 or 2.0,
  *  identifying the version of OPI to which the proxy corresponds.
 **/
   bool has_version_number() const {
     return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "version_number", "", NULL));
   }
 
-  SkPdfDictionary* version_number() const {
-    SkPdfDictionary* ret;
-    if (DictionaryFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "version_number", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return NULL;
-  }
-
+  SkPdfDictionary* version_number() const;
 };
 
 #endif  // __DEFINED__SkPdfOpiVersionDictionary