Deal with ca and CA transparency operators in pdf. add comments to generated classes.

experimental/PdfViewer/SkPdfRadioButtonFieldDictionary_autogen.h

Index: experimental/PdfViewer/SkPdfRadioButtonFieldDictionary_autogen.h
===================================================================
--- experimental/PdfViewer/SkPdfRadioButtonFieldDictionary_autogen.h	(revision 9684)
+++ experimental/PdfViewer/SkPdfRadioButtonFieldDictionary_autogen.h	(working copy)
@@ -5,6 +5,7 @@
 #include "SkPdfArray_autogen.h"
 #include "SkPdfDictionary_autogen.h"
 
+// Additional entry specific to a radio button field
 class SkPdfRadioButtonFieldDictionary : public SkPdfDictionary {
 public:
   virtual SkPdfObjectType getType() const { return kRadioButtonFieldDictionary_SkPdfObjectType;}
@@ -521,6 +522,16 @@
 
   SkPdfRadioButtonFieldDictionary& operator=(const SkPdfRadioButtonFieldDictionary& from) {this->fPodofoDoc = from.fPodofoDoc; this->fPodofoObj = from.fPodofoObj; return *this;}
 
+/** (Optional; inheritable; PDF 1.4) An array of text strings to be used in
+ *  place of the V entries for the values of the widget annotations repre-
+ *  senting the individual radio buttons. Each element in the array repre-
+ *  sents the export value of the corresponding widget annotation in the
+ *  Kids array of the radio button field.
+**/
+  bool has_Opt() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Opt", "", NULL));
+  }
+
   SkPdfArray Opt() const {
     SkPdfArray ret;
     if (ArrayFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Opt", "", &ret)) return ret;