Suppress the clang warning "-Wdeprecated-declarations" for CSSM API calls.

net/cert/x509_cert_types_mac.cc

Index: net/cert/x509_cert_types_mac.cc
diff --git a/net/cert/x509_cert_types_mac.cc b/net/cert/x509_cert_types_mac.cc
index c8ed4fe00f5a508a627abf856a2b7045c79fa8ed..4a7a968fa27fdefe52e843fe04ac74fc1188452c 100644
--- a/net/cert/x509_cert_types_mac.cc
+++ b/net/cert/x509_cert_types_mac.cc
@@ -19,6 +19,11 @@ namespace net {
 
 namespace {
 
+// CSSM functions are deprecated as of OSX 10.7, but have no replacement.
+// https://bugs.chromium.org/p/chromium/issues/detail?id=590914#c1
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+
 // The BER encoding of 0.9.2342.19200300.100.1.25.
 // On 10.6 and later this is available as CSSMOID_DomainComponent, which is an
 // external symbol from Security.framework. However, it appears that Apple's
@@ -289,4 +294,6 @@ bool CertPrincipal::Matches(const CertPrincipal& against) const {
       match(domain_components, against.domain_components);
 }
 
+#pragma clang diagnostic pop  // "-Wdeprecated-declarations"
+
 }  // namespace net