WKWebView(iOS9): correctly update SSL status for current navigation item

ios/web/web_state/wk_web_view_security_util.mm

Index: ios/web/web_state/wk_web_view_security_util.mm
diff --git a/ios/web/web_state/wk_web_view_security_util.mm b/ios/web/web_state/wk_web_view_security_util.mm
index 0cc3ba913b30403492a42e8b196d854bccb05cbb..dae0748235595999ed1f566cda3ee66ff32cc3db 100644
--- a/ios/web/web_state/wk_web_view_security_util.mm
+++ b/ios/web/web_state/wk_web_view_security_util.mm
@@ -94,6 +94,20 @@ scoped_refptr<net::X509Certificate> CreateCertFromTrust(SecTrustRef trust) {
       SecTrustGetCertificateAtIndex(trust, 0), intermediates);
 }
 
+base::ScopedCFTypeRef<SecTrustRef> CreateServerTrustFromChain(NSArray* certs,
+                                                              NSString* host) {
+  if (certs.count == 0)
+    return base::ScopedCFTypeRef<SecTrustRef>();
+
+  base::ScopedCFTypeRef<SecPolicyRef> policy(
+      SecPolicyCreateSSL(TRUE, static_cast<CFStringRef>(host)));
+  SecTrustRef result = nullptr;
+  if (SecTrustCreateWithCertificates(certs, policy, &result) == errSecSuccess) {
+    return base::ScopedCFTypeRef<SecTrustRef>(result);
+  }
+  return base::ScopedCFTypeRef<SecTrustRef>();
+}
+
 void EnsureFutureTrustEvaluationSucceeds(SecTrustRef trust) {
   base::ScopedCFTypeRef<CFDataRef> exceptions(SecTrustCopyExceptions(trust));
   SecTrustSetExceptions(trust, exceptions);
@@ -116,4 +130,21 @@ void GetSSLInfoFromWKWebViewSSLError(NSError* error, net::SSLInfo* ssl_info) {
   ssl_info->cert = CreateCertFromSSLError(error);
 }
 
+SecurityStyle GetSecurityStyleFromTrustResult(SecTrustResultType result) {
+  switch (result) {
+    case kSecTrustResultInvalid:
+      return SECURITY_STYLE_UNKNOWN;
+    case kSecTrustResultProceed:
+    case kSecTrustResultUnspecified:
+      return SECURITY_STYLE_AUTHENTICATED;
+    case kSecTrustResultDeny:
+    case kSecTrustResultRecoverableTrustFailure:
+    case kSecTrustResultFatalTrustFailure:
+    case kSecTrustResultOtherError:
+      return SECURITY_STYLE_AUTHENTICATION_BROKEN;
+  }
+  NOTREACHED();
+  return SECURITY_STYLE_UNKNOWN;
+}
+
 }  // namespace web