Adding ability for BaseChannel to use PacketTransportInterface.

webrtc/p2p/base/fakecandidatepair.h

Index: webrtc/p2p/base/fakecandidatepair.h
diff --git a/webrtc/p2p/base/fakecandidatepair.h b/webrtc/p2p/base/fakecandidatepair.h
new file mode 100644
index 0000000000000000000000000000000000000000..73e6c6794db7521699131115be8ca75a6583fa2a
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+++ b/webrtc/p2p/base/fakecandidatepair.h
@@ -0,0 +1,54 @@
+/*
+ *  Copyright 2017 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_P2P_BASE_FAKECANDIDATEPAIR_H_
+#define WEBRTC_P2P_BASE_FAKECANDIDATEPAIR_H_
+
+#include <memory>
+
+#include "webrtc/p2p/base/candidate.h"
+#include "webrtc/p2p/base/candidatepairinterface.h"
+
+namespace cricket {
+
+// Fake candidate pair class, which can be passed to BaseChannel for testing
+// purposes.
+class FakeCandidatePair : public CandidatePairInterface {
+ public:
+  FakeCandidatePair(const Candidate& local_candidate,
+                    const Candidate& remote_candidate)
+      : local_candidate_(local_candidate),
+        remote_candidate_(remote_candidate) {}
+  const Candidate& local_candidate() const override { return local_candidate_; }
+  const Candidate& remote_candidate() const override {
+    return remote_candidate_;
+  }
+
+  static std::unique_ptr<FakeCandidatePair> Create(
+      const rtc::SocketAddress& local_address,
+      int16_t local_network_id,
+      const rtc::SocketAddress& remote_address,
+      int16_t remote_network_id) {
+    Candidate local_candidate(0, "udp", local_address, 0u, "", "", "local", 0,
+                              "foundation", local_network_id, 0);
+    Candidate remote_candidate(0, "udp", remote_address, 0u, "", "", "local", 0,
+                               "foundation", remote_network_id, 0);
+    return std::unique_ptr<FakeCandidatePair>(
+        new FakeCandidatePair(local_candidate, remote_candidate));
+  }
+
+ private:
+  Candidate local_candidate_;
+  Candidate remote_candidate_;
+};
+
+}  // namespace cricket
+
+#endif  // WEBRTC_P2P_BASE_FAKECANDIDATEPAIR_H_