Revert of Replacing DtlsIdentityStoreInterface with RTCCertificateGeneratorInterface.

webrtc/api/webrtcsession_unittest.cc

 /*
  *  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 379 matching lines @@
     session_->SignalDataChannelOpenMessage.connect(
         this, &WebRtcSessionTest::OnDataChannelOpenMessage);
     session_->GetOnDestroyedSignal()->connect(
         this, &WebRtcSessionTest::OnSessionDestroyed);
 
     EXPECT_EQ(PeerConnectionInterface::kIceConnectionNew,
         observer_.ice_connection_state_);
     EXPECT_EQ(PeerConnectionInterface::kIceGatheringNew,
         observer_.ice_gathering_state_);
 
-    std::unique_ptr<rtc::RTCCertificateGeneratorInterface> cert_generator(
-        dtls_identity_store ? new webrtc::RTCCertificateGeneratorStoreWrapper(
-            std::move(dtls_identity_store)) : nullptr);
-    EXPECT_TRUE(session_->Initialize(options_, std::move(cert_generator),
+    EXPECT_TRUE(session_->Initialize(options_, std::move(dtls_identity_store),
                                      configuration_));
     session_->set_metrics_observer(metrics_observer_);
   }
 
   void OnDataChannelOpenMessage(const std::string& label,
                                 const InternalDataChannelInit& config) {
     last_data_channel_label_ = label;
     last_data_channel_config_ = config;
   }
 
@@ skipping 4006 matching lines @@
 }
 
 // TODO(bemasc): Add a TestIceStatesBundle with BUNDLE enabled.  That test
 // currently fails because upon disconnection and reconnection OnIceComplete is
 // called more than once without returning to IceGatheringGathering.
 
 INSTANTIATE_TEST_CASE_P(WebRtcSessionTests,
                         WebRtcSessionTest,
                         testing::Values(ALREADY_GENERATED,
                                         DTLS_IDENTITY_STORE));