move X509Certificate::SupportsSSLClientAuth to client_cert_store_mac.cc

net/cert/x509_certificate_ios.cc

Index: net/cert/x509_certificate_ios.cc
diff --git a/net/cert/x509_certificate_ios.cc b/net/cert/x509_certificate_ios.cc
index 737970768fbbeb59c9ec546c500ad3c7766b031c..ce93f90dd7918a90a12d62904f468bf5cbb70484 100644
--- a/net/cert/x509_certificate_ios.cc
+++ b/net/cert/x509_certificate_ios.cc
@@ -358,10 +358,6 @@ void X509Certificate::GetPublicKeyInfo(OSCertHandle os_cert,
   *size_bits = EVP_PKEY_bits(key);
 }
 
-bool X509Certificate::SupportsSSLClientAuth() const {
-  return false;
-}
-
 CFMutableArrayRef X509Certificate::CreateOSCertChainForCert() const {
   CFMutableArrayRef cert_list =
       CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks);