Add XFA pdfium fuzzer

pdf/pdfium/fuzzers/BUILD.gn

Index: pdf/pdfium/fuzzers/BUILD.gn
diff --git a/pdf/pdfium/fuzzers/BUILD.gn b/pdf/pdfium/fuzzers/BUILD.gn
index 70a043c5e3f4c1e3716447771ff42ac1d7d07a73..c5aaf3af47ec4197039f055e6018805be2c6aa61 100644
--- a/pdf/pdfium/fuzzers/BUILD.gn
+++ b/pdf/pdfium/fuzzers/BUILD.gn
@@ -14,6 +14,8 @@ group("fuzzers") {
 fuzzer_test("pdfium_fuzzer") {
   sources = [
     "pdfium_fuzzer.cc",
+    "pdfium_fuzzer_helper.cc",
+    "pdfium_fuzzer_helper.h",
   ]
   deps = [
     "//third_party/pdfium",
@@ -26,6 +28,7 @@ fuzzer_test("pdfium_fuzzer") {
     "//v8:external_startup_data",
   ]
   dict = "dicts/pdf.dict"
+  seed_corpus = "src/third_party/pdfium/test"
 }
 
 fuzzer_test("pdf_cmap_fuzzer") {
@@ -181,4 +184,24 @@ if (pdf_enable_xfa) {
     ]
     dict = "dicts/pdf_xml.dict"
   }
+
+  fuzzer_test("pdfium_xfa_fuzzer") {
+    sources = [
+      "pdfium_fuzzer_helper.cc",
+      "pdfium_fuzzer_helper.h",
+      "pdfium_xfa_fuzzer.cc",
+    ]
+    deps = [
+      "//third_party/pdfium",
+      "//third_party/pdfium:test_support",
+      "//v8",
+      "//v8:v8_libplatform",
+    ]
+    additional_configs = [
+      "//third_party/pdfium:pdfium_core_config",
+      "//v8:external_startup_data",
+    ]
+    dict = "dicts/pdf.dict"
+    seed_corpus = "src/third_party/pdfium/test"
+  }
 }