Fix TransportSecurityState unittests to run in --single-process mode.

components/certificate_reporting/error_report_unittest.cc

Index: components/certificate_reporting/error_report_unittest.cc
diff --git a/components/certificate_reporting/error_report_unittest.cc b/components/certificate_reporting/error_report_unittest.cc
index 18c548ca473749a5490d8761c961dfd71b2aeff0..59bc29717d85bb304eb79bfa02fe5ea69510da62 100644
--- a/components/certificate_reporting/error_report_unittest.cc
+++ b/components/certificate_reporting/error_report_unittest.cc
@@ -41,7 +41,7 @@ namespace {
 
 const char kDummyHostname[] = "dummy.hostname.com";
 const char kDummyFailureLog[] = "dummy failure log";
-const char kTestCertFilename[] = "test_mail_google_com.pem";
+const char kTestCertFilename[] = "ok_cert.pem";
 
 const net::CertStatus kCertStatus =
     net::CERT_STATUS_COMMON_NAME_INVALID | net::CERT_STATUS_REVOKED;