Add tests for CBA_AnnotIterator.

testing/embedder_test.h

Index: testing/embedder_test.h
diff --git a/testing/embedder_test.h b/testing/embedder_test.h
index a21a55de2ca7a030a37bbd5f94e24768e3ba000f..3f6acac5ef4da2208acf9075dce79f2632382e6a 100644
--- a/testing/embedder_test.h
+++ b/testing/embedder_test.h
@@ -9,6 +9,7 @@
 #include <memory>
 #include <string>
 
+#include "fpdfsdk/include/fsdk_mgr.h"
 #include "public/fpdf_dataavail.h"
 #include "public/fpdf_ext.h"
 #include "public/fpdf_formfill.h"
@@ -76,8 +77,9 @@ class EmbedderTest : public ::testing::Test,
     delegate_ = delegate ? delegate : default_delegate_.get();
   }
 
-  FPDF_DOCUMENT document() { return document_; }
-  FPDF_FORMHANDLE form_handle() { return form_handle_; }
+  FPDF_DOCUMENT document() const { return document_; }
+  FPDF_FORMHANDLE form_handle() const { return form_handle_; }
+  CPDFSDK_Document* GetSDKDocument() const;
 
   // Create an empty document, and its form fill environment. Returns true
   // on success or false on failure.