Merge to XFA: Add embedder test for fix to bug_452455.

fpdfsdk/src/fpdfview_embeddertest.cpp

Index: fpdfsdk/src/fpdfview_embeddertest.cpp
diff --git a/fpdfsdk/src/fpdfview_embeddertest.cpp b/fpdfsdk/src/fpdfview_embeddertest.cpp
index 4827f76839569551ea87c92415c490e9baba41f7..083925ff61697f2fa5ffb561f2204624ad309e49 100644
--- a/fpdfsdk/src/fpdfview_embeddertest.cpp
+++ b/fpdfsdk/src/fpdfview_embeddertest.cpp
@@ -177,7 +177,13 @@ TEST_F(FPDFViewEmbeddertest, NamedDestsByName) {
 }
 
 // The following tests pass if the document opens without crashing.
-TEST_F(FPDFViewEmbeddertest, Crashers) {
+TEST_F(FPDFViewEmbeddertest, Crasher1) {
   // XFA branch detects this document as bad.
   EXPECT_FALSE(OpenDocument("testing/resources/bug_451830.pdf"));
 }
+
+TEST_F(FPDFViewEmbeddertest, Crasher2) {
+  EXPECT_TRUE(OpenDocument("testing/resources/bug_452455.pdf"));
+  FPDF_PAGE page = LoadPage(0);
+  EXPECT_NE(nullptr, page);
+}