Skip CertVerifyProcTest.MacCRLIntermediate on Sierra (Mac OS 10.12)

net/cert/cert_verify_proc_unittest.cc

Index: net/cert/cert_verify_proc_unittest.cc
diff --git a/net/cert/cert_verify_proc_unittest.cc b/net/cert/cert_verify_proc_unittest.cc
index d5ccf60b52a9e63fcd174c654d87161ab471e407..96ce38c4d6653cc44d1fab189965cf5e3af9d5ff 100644
--- a/net/cert/cert_verify_proc_unittest.cc
+++ b/net/cert/cert_verify_proc_unittest.cc
@@ -1403,6 +1403,11 @@ TEST_F(CertVerifyProcTest, CRLSetDuringPathBuilding) {
 // The verifier should rollback until it just tries A(B) alone, at which point
 // it will pull B(F) & F(E) from the keychain and succeed.
 TEST_F(CertVerifyProcTest, MacCRLIntermediate) {
+  if (base::mac::IsAtLeastOS10_12()) {
+    // TODO(crbug.com/671889): Investigate SecTrustSetKeychains issue on Sierra.
+    LOG(INFO) << "Skipping test, SecTrustSetKeychains does not work on 10.12";
+    return;
+  }
   const char* const kPath2Files[] = {
       "multi-root-A-by-B.pem", "multi-root-B-by-C.pem", "multi-root-C-by-E.pem",
       "multi-root-E-by-E.pem"};