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

experimental/PdfViewer/SkPdfComponentsWithMetadataDictionary_autogen.h

Index: experimental/PdfViewer/SkPdfComponentsWithMetadataDictionary_autogen.h
===================================================================
--- experimental/PdfViewer/SkPdfComponentsWithMetadataDictionary_autogen.h	(revision 9684)
+++ experimental/PdfViewer/SkPdfComponentsWithMetadataDictionary_autogen.h	(working copy)
@@ -5,6 +5,7 @@
 #include "SkPdfArray_autogen.h"
 #include "SkPdfDictionary_autogen.h"
 
+// Additional entry for components having metadata
 class SkPdfComponentsWithMetadataDictionary : public SkPdfDictionary {
 public:
   virtual SkPdfObjectType getType() const { return kComponentsWithMetadataDictionary_SkPdfObjectType;}
@@ -521,6 +522,12 @@
 
   SkPdfComponentsWithMetadataDictionary& operator=(const SkPdfComponentsWithMetadataDictionary& from) {this->fPodofoDoc = from.fPodofoDoc; this->fPodofoObj = from.fPodofoObj; return *this;}
 
+/** (Optional; PDF 1.4) A metadata stream containing metadata for the component.
+**/
+  bool has_Metadata() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Metadata", "", NULL));
+  }
+
   SkPdfStream Metadata() const {
     SkPdfStream ret;
     if (StreamFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Metadata", "", &ret)) return ret;