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

experimental/PdfViewer/SkPdfAlternateImageDictionary_autogen.h

Index: experimental/PdfViewer/SkPdfAlternateImageDictionary_autogen.h
===================================================================
--- experimental/PdfViewer/SkPdfAlternateImageDictionary_autogen.h	(revision 9684)
+++ experimental/PdfViewer/SkPdfAlternateImageDictionary_autogen.h	(working copy)
@@ -5,6 +5,7 @@
 #include "SkPdfArray_autogen.h"
 #include "SkPdfDictionary_autogen.h"
 
+// Entries in an alternate image dictionary
 class SkPdfAlternateImageDictionary : public SkPdfDictionary {
 public:
   virtual SkPdfObjectType getType() const { return kAlternateImageDictionary_SkPdfObjectType;}
@@ -521,6 +522,12 @@
 
   SkPdfAlternateImageDictionary& operator=(const SkPdfAlternateImageDictionary& from) {this->fPodofoDoc = from.fPodofoDoc; this->fPodofoObj = from.fPodofoObj; return *this;}
 
+/** (Required) The image XObject for the alternate image.
+**/
+  bool has_Image() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Image", "", NULL));
+  }
+
   SkPdfStream Image() const {
     SkPdfStream ret;
     if (StreamFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Image", "", &ret)) return ret;
@@ -528,6 +535,15 @@
     return SkPdfStream();
   }
 
+/** (Optional) A flag indicating whether this alternate image is the default ver-
+ *  sion to be used for printing. At most one alternate for a given base image may
+ *  be so designated. If no alternate has this entry set to true, the base image itself
+ *  is used for printing.
+**/
+  bool has_DefaultForPrinting() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "DefaultForPrinting", "", NULL));
+  }
+
   bool DefaultForPrinting() const {
     bool ret;
     if (BoolFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "DefaultForPrinting", "", &ret)) return ret;