Remove DtlsIdentityStoreInterface, it is no longer used.

webrtc/api/test/fakertccertificategenerator.h

 /*
  *  Copyright 2013 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.
  */
 
 #ifndef WEBRTC_API_TEST_FAKERTCCERTIFICATEGENERATOR_H_
 #define WEBRTC_API_TEST_FAKERTCCERTIFICATEGENERATOR_H_
 
 #include <memory>
 #include <string>
 #include <utility>
 
-#include "webrtc/api/dtlsidentitystore.h"
 #include "webrtc/api/peerconnectioninterface.h"
 #include "webrtc/base/rtccertificate.h"
+#include "webrtc/base/rtccertificategenerator.h"
 
 // RSA with mod size 1024, pub exp 0x10001.
 static const rtc::RTCCertificatePEM kRsaPems[] = {
     rtc::RTCCertificatePEM(
         "-----BEGIN RSA PRIVATE KEY-----\n"
          "MIICdwIBADANBgkqhkiG9w0BAQEFAASCAmEwggJdAgEAAoGBAMYRkbhmI7kVA/rM\n"
          "czsZ+6JDhDvnkF+vn6yCAGuRPV03zuRqZtDy4N4to7PZu9PjqrRl7nDMXrG3YG9y\n"
          "rlIAZ72KjcKKFAJxQyAKLCIdawKRyp8RdK3LEySWEZb0AV58IadqPZDTNHHRX8dz\n"
          "5aTSMsbbkZ+C/OzTnbiMqLL/vg6jAgMBAAECgYAvgOs4FJcgvp+TuREx7YtiYVsH\n"
          "mwQPTum2z/8VzWGwR8BBHBvIpVe1MbD/Y4seyI2aco/7UaisatSgJhsU46/9Y4fq\n"
@@ skipping 187 matching lines @@
         break;
     }
     delete message_data;
   }
 
   bool should_fail_;
   int key_index_ = 0;
 };
 
 #endif  // WEBRTC_API_TEST_FAKERTCCERTIFICATEGENERATOR_H_