[ios] Removed CertVerifierBlockAdapter.

net/cert/cert_verify_proc_ios.h

 // Copyright (c) 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_CERT_CERT_VERIFY_PROC_IOS_H_
 #define NET_CERT_CERT_VERIFY_PROC_IOS_H_
 
 #include "net/cert/cert_verify_proc.h"
 
+#include <Security/Security.h>

[Ryan Sleevi, 2016/08/12 00:16:23]

nit: Can you not forward declare this? Or include the more specific header
(Security/SecTrust.h)

[Eugene But (OOO till 7-30), 2016/08/12 16:16:40]

Including subframework would be a Style Guide violation:
go/objc-style#Use_Umbrella_Frameworks
This is from Objective-C style guide, but it's more a planform thing rather than
a language thing.

There is no maintainable way to predeclare Core Foundation-like types and this
is how it would look:
|typedef struct CF_BRIDGED_TYPE(id) __SecTrust *SecTrustRef;|

+
 namespace net {
 
 // Performs certificate path construction and validation using iOS's
 // Security.framework.
 class CertVerifyProcIOS : public CertVerifyProc {
  public:
   CertVerifyProcIOS();
 
+  // Returns error CertStatus from the given |trust| object. Returns
+  // CERT_STATUS_INVALID if the trust is null.
+  static CertStatus GetCertFailureStatusFromTrust(SecTrustRef trust);
+
   bool SupportsAdditionalTrustAnchors() const override;
   bool SupportsOCSPStapling() const override;
 
  protected:
   ~CertVerifyProcIOS() override;
 
  private:
   int VerifyInternal(X509Certificate* cert,
                      const std::string& hostname,
                      const std::string& ocsp_response,
                      int flags,
                      CRLSet* crl_set,
                      const CertificateList& additional_trust_anchors,
                      CertVerifyResult* verify_result) override;
 };
 
 }  // namespace net
 
 #endif  // NET_CERT_CERT_VERIFY_PROC_IOS_H_