Convert iOS to use X509CertificateBytes.

net/BUILD.gn

Index: net/BUILD.gn
diff --git a/net/BUILD.gn b/net/BUILD.gn
index 33c06a17e2e51ff51825f4c31be7239bc6205ea3..efd0a86ae2f9d46146d572c09dfe0325458c871b 100644
--- a/net/BUILD.gn
+++ b/net/BUILD.gn
@@ -41,7 +41,7 @@ enable_built_in_dns = !is_ios && !is_proto_quic
 # in addition to use_openssl_certs or use_nss_certs, in that case byte certs
 # are used internally but OpenSSL or NSS are used for certificate verification.
 # TODO(mattm): crbug.com/671420: Implement and enable this for all platforms.
-use_byte_certs = is_mac || is_android || is_nacl
+use_byte_certs = is_mac || is_android || is_nacl || is_ios
 
 buildflag_header("features") {
   header = "net_features.h"
@@ -605,6 +605,8 @@ component("net") {
       "cert/x509_util_android.h",
       "cert/x509_util_ios.cc",
       "cert/x509_util_ios.h",
+      "cert/x509_util_ios_and_mac.cc",
+      "cert/x509_util_ios_and_mac.h",
       "cert/x509_util_mac.cc",
       "cert/x509_util_mac.h",
       "cert/x509_util_nss.cc",
@@ -1892,6 +1894,8 @@ component("net") {
         "base/network_interfaces_mac.h",
         "base/platform_mime_util_mac.mm",
         "cert/test_root_certs_mac.cc",
+        "cert/x509_util_ios_and_mac.cc",
+        "cert/x509_util_ios_and_mac.h",
         "proxy/proxy_resolver_mac.cc",
         "proxy/proxy_resolver_mac.h",
         "proxy/proxy_server_mac.cc",