Refactor net tests to use GMock matchers for checking net::Error results

net/cert/test_root_certs_unittest.cc

Index: net/cert/test_root_certs_unittest.cc
diff --git a/net/cert/test_root_certs_unittest.cc b/net/cert/test_root_certs_unittest.cc
index f9e1e0eb18336dc3eb50a148ee190c77daa81c59..b08926f3b93dc69394d700ef5a28de6c698543fc 100644
--- a/net/cert/test_root_certs_unittest.cc
+++ b/net/cert/test_root_certs_unittest.cc
@@ -11,13 +11,17 @@
 #include "net/cert/test_root_certs.h"
 #include "net/cert/x509_certificate.h"
 #include "net/test/cert_test_util.h"
+#include "net/test/gtest_util.h"
 #include "net/test/test_data_directory.h"
+#include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(USE_NSS_CERTS)
 #include <nss.h>
 #endif
 
+using net::test::IsOk;
+
 namespace net {
 
 namespace {
@@ -105,7 +109,7 @@ TEST(TestRootCertsTest, OverrideTrust) {
   int good_status =
       verify_proc->Verify(test_cert.get(), "127.0.0.1", std::string(), flags,
                           NULL, CertificateList(), &good_verify_result);
-  EXPECT_EQ(OK, good_status);
+  EXPECT_THAT(good_status, IsOk());
   EXPECT_EQ(0u, good_verify_result.cert_status);
 
   test_roots->Clear();