Refactor some certificate verification tests in preparation to adding

net/cert/internal/test_helpers.h

Index: net/cert/internal/test_helpers.h
diff --git a/net/cert/internal/test_helpers.h b/net/cert/internal/test_helpers.h
index 999c37b55699cc02d059cad4caadeebf6a536510..414935b3bd6e8b0dafa081652a5e369d67a8b440 100644
--- a/net/cert/internal/test_helpers.h
+++ b/net/cert/internal/test_helpers.h
@@ -11,6 +11,8 @@
 #include <string>
 #include <vector>
 
+#include "net/cert/internal/parsed_certificate.h"
+#include "net/cert/internal/trust_store.h"
 #include "net/der/input.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -74,6 +76,18 @@ template <size_t N>
   return ReadTestDataFromPemFile(file_path_ascii, mappings, N);
 }
 
+// Reads a test case from |file_name|. Test cases are comprised of a
+// certificate chain, trust anchor, a timestamp to validate at, and the
+// expected result of verification.
+void ReadVerifyCertChainTestFromFile(const std::string& file_name,
+                                     ParsedCertificateList* chain,
+                                     scoped_refptr<TrustAnchor>* trust_anchor,
+                                     der::GeneralizedTime* time,
+                                     bool* verify_result);
+
+// Reads a data file relative to the src root directory.
+std::string ReadTestFileToString(const std::string& file_name);
+
 }  // namespace net
 
 #endif  // NET_CERT_INTERNAL_TEST_HELPERS_H_