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

experimental/PdfViewer/SkPdfOpiVersionDictionary_autogen.h

 #ifndef __DEFINED__SkPdfOpiVersionDictionary
 #define __DEFINED__SkPdfOpiVersionDictionary
 
 #include "SkPdfEnums_autogen.h"
 #include "SkPdfArray_autogen.h"
 #include "SkPdfDictionary_autogen.h"
 
+// Entry in an OPI version dictionary
 class SkPdfOpiVersionDictionary : public SkPdfDictionary {
 public:
   virtual SkPdfObjectType getType() const { return kOpiVersionDictionary_SkPdfObjectType;}
   virtual SkPdfObjectType getTypeEnd() const { return (SkPdfObjectType)(kOpiVersionDictionary_SkPdfObjectType + 1);}
 public:
   virtual SkPdfOpiVersionDictionary* asOpiVersionDictionary() {return this;}
   virtual const SkPdfOpiVersionDictionary* asOpiVersionDictionary() const {return this;}
 
 private:
   virtual SkPdfALinkAnnotationDictionary* asALinkAnnotationDictionary() {return NULL;}
@@ skipping 496 matching lines @@
 
 public:
 private:
 public:
   SkPdfOpiVersionDictionary(const PdfMemDocument* podofoDoc = NULL, const PdfObject* podofoObj = NULL) : SkPdfDictionary(podofoDoc, podofoObj) {}
 
   virtual bool valid() const {return true;}
 
   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;
   }
 
 };
 
 #endif  // __DEFINED__SkPdfOpiVersionDictionary