refactoring for pdf viewer lib

experimental/PdfViewer/autogen/SkPdfComponentsWithMetadataDictionary_autogen.h

 #ifndef __DEFINED__SkPdfComponentsWithMetadataDictionary
 #define __DEFINED__SkPdfComponentsWithMetadataDictionary
 
 #include "SkPdfUtils.h"
 #include "SkPdfEnums_autogen.h"
 #include "SkPdfArray_autogen.h"
 #include "SkPdfDictionary_autogen.h"
 
 // Additional entry for components having metadata
 class SkPdfComponentsWithMetadataDictionary : public SkPdfDictionary {
@@ skipping 513 matching lines @@
   virtual bool valid() const {return true;}
 
   SkPdfComponentsWithMetadataDictionary& operator=(const SkPdfComponentsWithMetadataDictionary& from) {this->fPodofoDoc = from.fPodofoDoc; this->fPodofoObj = from.fPodofoObj; return *this;}
 
 /** (Optional; PDF 1.4) A metadata stream containing metadata for the component.
 **/
   bool has_Metadata() const {
     return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Metadata", "", NULL));
   }
 
-  SkPdfStream* 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;
-  }
-
+  SkPdfStream* Metadata() const;
 };
 
 #endif  // __DEFINED__SkPdfComponentsWithMetadataDictionary