Reland of relax a couple checks to allow certain non-standard PDF files.

core/fpdfapi/fpdf_parser/cpdf_parser_embeddertest.cpp

Index: core/fpdfapi/fpdf_parser/cpdf_parser_embeddertest.cpp
diff --git a/core/fpdfapi/fpdf_parser/cpdf_parser_embeddertest.cpp b/core/fpdfapi/fpdf_parser/cpdf_parser_embeddertest.cpp
index 042b221554fecfad98c082bd6043e0dc94766d9d..d070bd6a4c7d126f85dfa9dc2da8993be6809b52 100644
--- a/core/fpdfapi/fpdf_parser/cpdf_parser_embeddertest.cpp
+++ b/core/fpdfapi/fpdf_parser/cpdf_parser_embeddertest.cpp
@@ -54,3 +54,19 @@
   FPDFText_ClosePage(text_page);
   UnloadPage(page);
 }
+
+TEST_F(CPDFParserEmbeddertest, Bug_596947) {
+  // Test the case that the size of cross reference entries doesn't match with
+  // what is defined, and a certain case of reuse object number for cross
+  // reference object.
+  EXPECT_TRUE(OpenDocument("bug_596947.pdf"));
+  FPDF_PAGE page = LoadPage(0);
+  EXPECT_NE(nullptr, page);
+  FPDF_TEXTPAGE text_page = FPDFText_LoadPage(page);
+  EXPECT_NE(nullptr, text_page);
+  // The page should not be blank.
+  EXPECT_LT(0, FPDFText_CountChars(text_page));
+
+  FPDFText_ClosePage(text_page);
+  UnloadPage(page);
+}