Allways call didReceiveAuthenticationChallenge: completion handler.

ios/web/net/cert_verifier_block_adapter.h

 // Copyright 2015 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 IOS_WEB_NET_CERT_VERIFIER_BLOCK_ADAPTER_H_
 #define IOS_WEB_NET_CERT_VERIFIER_BLOCK_ADAPTER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/threading/thread_checker.h"
@@ skipping 54 matching lines @@
   // Type of verification completion block. If cert is successfully validated
   // |error| is OK, otherwise |error| is a net error code.
   typedef void (^CompletionHandler)(net::CertVerifyResult result, int error);
 
   // Verifies certificate with given |params|. |completion_handler| must not be
   // null and can be called either synchronously (in the same runloop) or
   // asynchronously.
   void Verify(const Params& params, CompletionHandler completion_handler);
 
  private:
-  // Pending verification requests. Request must be alive until verification is
-  // completed, otherwise verification operation will be cancelled.
-  ScopedVector<net::CertVerifier::Request> pending_requests_;
   // Underlying unowned CertVerifier.
   net::CertVerifier* cert_verifier_;
   // Unowned NetLog required by CertVerifier.
   net::NetLog* net_log_;
   // CertVerifierBlockAdapter should be used on the same thread where it was
   // created.
   base::ThreadChecker thread_checker_;
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_NET_CERT_VERIFIER_BLOCK_ADAPTER_H_