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

experimental/PdfViewer/SkPdfApplicationDataDictionary_autogen.h

 #ifndef __DEFINED__SkPdfApplicationDataDictionary
 #define __DEFINED__SkPdfApplicationDataDictionary
 
 #include "SkPdfEnums_autogen.h"
 #include "SkPdfArray_autogen.h"
 #include "SkPdfDictionary_autogen.h"
 
+// Entries in an application data dictionary
 class SkPdfApplicationDataDictionary : public SkPdfDictionary {
 public:
   virtual SkPdfObjectType getType() const { return kApplicationDataDictionary_SkPdfObjectType;}
   virtual SkPdfObjectType getTypeEnd() const { return (SkPdfObjectType)(kApplicationDataDictionary_SkPdfObjectType + 1);}
 public:
   virtual SkPdfApplicationDataDictionary* asApplicationDataDictionary() {return this;}
   virtual const SkPdfApplicationDataDictionary* asApplicationDataDictionary() const {return this;}
 
 private:
   virtual SkPdfALinkAnnotationDictionary* asALinkAnnotationDictionary() {return NULL;}
@@ skipping 496 matching lines @@
 
 public:
 private:
 public:
   SkPdfApplicationDataDictionary(const PdfMemDocument* podofoDoc = NULL, const PdfObject* podofoObj = NULL) : SkPdfDictionary(podofoDoc, podofoObj) {}
 
   virtual bool valid() const {return true;}
 
   SkPdfApplicationDataDictionary& operator=(const SkPdfApplicationDataDictionary& from) {this->fPodofoDoc = from.fPodofoDoc; this->fPodofoObj = from.fPodofoObj; return *this;}
 
+/** (Required) The date and time when the contents of the page or form
+ *  were most recently modified by this application.
+**/
+  bool has_LastModified() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "LastModified", "", NULL));
+  }
+
   SkPdfDate LastModified() const {
     SkPdfDate ret;
     if (DateFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "LastModified", "", &ret)) return ret;
     // TODO(edisonn): warn about missing required field, assert for known good pdfs
     return SkPdfDate();
   }
 
+/** (Optional) Any private data appropriate to the application, typically
+ *  in the form of a dictionary.
+**/
+  bool has_Private() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Private", "", NULL));
+  }
+
   SkPdfObject* Private() const {
     SkPdfObject* ret;
     if (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Private", "", &ret)) return ret;
     // TODO(edisonn): warn about missing required field, assert for known good pdfs
     return NULL;
   }
 
 };
 
 #endif  // __DEFINED__SkPdfApplicationDataDictionary