refactoring for pdf viewer lib

experimental/PdfViewer/autogen/SkPdfDeviceNColorSpaceDictionary_autogen.h

 #ifndef __DEFINED__SkPdfDeviceNColorSpaceDictionary
 #define __DEFINED__SkPdfDeviceNColorSpaceDictionary
 
 #include "SkPdfUtils.h"
 #include "SkPdfEnums_autogen.h"
 #include "SkPdfArray_autogen.h"
 #include "SkPdfDictionary_autogen.h"
 
 // Entry in a DeviceN color space attributes dictionary
 class SkPdfDeviceNColorSpaceDictionary : public SkPdfDictionary {
@@ skipping 524 matching lines @@
  *  the appearance that it produces. However, it provides information about the indi-
  *  vidual colorants that may be useful to some applications. In particular, the alter-
  *  nate color space and tint transformation function of a Separation color space
  *  describe the appearance of that colorant alone, whereas those of a DeviceN color
  *  space describe only the appearance of its colorants in combination.
 **/
   bool has_Colorants() const {
     return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Colorants", "", NULL));
   }
 
-  SkPdfDictionary* Colorants() const {
-    SkPdfDictionary* ret;
-    if (DictionaryFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Colorants", "", &ret)) return ret;
-    // TODO(edisonn): warn about missing required field, assert for known good pdfs
-    return NULL;
-  }
-
+  SkPdfDictionary* Colorants() const;
 };
 
 #endif  // __DEFINED__SkPdfDeviceNColorSpaceDictionary