Provide method for returning certificate expiration timestamp.

webrtc/base/fakesslidentity.h

 /*
  *  Copyright 2012 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 27 matching lines @@
     return new FakeSSLCertificate(*this);
   }
   virtual std::string ToPEMString() const {
     return data_;
   }
   virtual void ToDER(Buffer* der_buffer) const {
     std::string der_string;
     VERIFY(SSLIdentity::PemToDer(kPemTypeCertificate, data_, &der_string));
     der_buffer->SetData(der_string.c_str(), der_string.size());
   }
+  int64_t CertificateExpirationTime() const override { return -1; }
   void set_digest_algorithm(const std::string& algorithm) {
     digest_algorithm_ = algorithm;
   }
   virtual bool GetSignatureDigestAlgorithm(std::string* algorithm) const {
     *algorithm = digest_algorithm_;
     return true;
   }
   virtual bool ComputeDigest(const std::string& algorithm,
                              unsigned char* digest,
                              size_t size,
@@ skipping 30 matching lines @@
     return new FakeSSLIdentity(*this);
   }
   virtual const FakeSSLCertificate& certificate() const { return cert_; }
  private:
   FakeSSLCertificate cert_;
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_FAKESSLIDENTITY_H_