refactoring for pdf viewer lib

experimental/PdfViewer/autogen/SkPdfURIDictionary_autogen.h

 #ifndef __DEFINED__SkPdfURIDictionary
 #define __DEFINED__SkPdfURIDictionary
 
 #include "SkPdfUtils.h"
 #include "SkPdfEnums_autogen.h"
 #include "SkPdfArray_autogen.h"
 #include "SkPdfDictionary_autogen.h"
 
 // Entry in a URI dictionary
 class SkPdfURIDictionary : public SkPdfDictionary {
@@ skipping 518 matching lines @@
  *  within the document may specify URIs in partial form, to be interpreted relative to
  *  this base address. If no base URI is specified, such partial URIs will be interpreted rel-
  *  ative to the location of the document itself. The use of this entry is parallel to that of
  *  the body element <BASE>, as described in section 2.7.2 of Internet RFC 1866, Hyper-
  *  text Markup Language 2.0 Proposed Standard (see the Bibliography).
 **/
   bool has_Base() const {
     return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Base", "", NULL));
   }
 
-  std::string Base() const {
-    std::string ret;
-    if (StringFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Base", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return "";
-  }
-
+  std::string Base() const;
 };
 
 #endif  // __DEFINED__SkPdfURIDictionary