Minor refactors to enable sending an Expect-CT header more easily.

net/quic/test_tools/crypto_test_utils.h

Index: net/quic/test_tools/crypto_test_utils.h
diff --git a/net/quic/test_tools/crypto_test_utils.h b/net/quic/test_tools/crypto_test_utils.h
index 2405442ee9e01057edcf8f2b307508e971b4c2a4..a9ac2d763f39956cc5d2f845895d59cde7c707d2 100644
--- a/net/quic/test_tools/crypto_test_utils.h
+++ b/net/quic/test_tools/crypto_test_utils.h
@@ -144,7 +144,13 @@ class CryptoTestUtils {
   // Returns a new |ProofSource| that serves up test certificates.
   static std::unique_ptr<ProofSource> ProofSourceForTesting();
 
-  // Returns a |ProofVerifier| that uses the QUIC testing root CA.
+  // Identical to |ProofSourceForTesting|, with the addition of setting
+  // the |emit_expect_ct_header| field on the test certificates
+  // to be the value of |send_expect_ct_header|.
+  static std::unique_ptr<ProofSource> ProofSourceForTesting(
+      bool send_expect_ct_header);
+
+  // Returns a new |ProofVerifier| that uses the QUIC testing root CA.
   static std::unique_ptr<ProofVerifier> ProofVerifierForTesting();
 
   // Returns a real ProofVerifier (not a fake proof verifier) for testing.