Revert of make the DtlsTransportWrapper inherit form DtlsTransportInternal

webrtc/p2p/base/transportchannel.cc

Index: webrtc/p2p/base/transportchannel.cc
diff --git a/webrtc/p2p/base/transportchannel.cc b/webrtc/p2p/base/transportchannel.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6cbe2b7583844c310f7b5d468f58d87dc8c36c1f
--- /dev/null
+++ b/webrtc/p2p/base/transportchannel.cc
@@ -0,0 +1,70 @@
+/*
+ *  Copyright 2004 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.
+ */
+
+#include <sstream>
+#include "webrtc/p2p/base/common.h"
+#include "webrtc/p2p/base/transportchannel.h"
+
+namespace cricket {
+
+std::string TransportChannel::ToString() const {
+  const char RECEIVING_ABBREV[2] = { '_', 'R' };
+  const char WRITABLE_ABBREV[2] = { '_', 'W' };
+  std::stringstream ss;
+  ss << "Channel[" << transport_name_ << "|" << component_ << "|"
+     << RECEIVING_ABBREV[receiving_] << WRITABLE_ABBREV[writable_] << "]";
+  return ss.str();
+}
+
+void TransportChannel::set_receiving(bool receiving) {
+  if (receiving_ == receiving) {
+    return;
+  }
+  receiving_ = receiving;
+  SignalReceivingState(this);
+}
+
+void TransportChannel::set_writable(bool writable) {
+  if (writable_ == writable) {
+    return;
+  }
+  LOG_J(LS_VERBOSE, this) << "set_writable from:" << writable_ << " to "
+                          << writable;
+  writable_ = writable;
+  if (writable_) {
+    SignalReadyToSend(this);
+  }
+  SignalWritableState(this);
+}
+
+void TransportChannel::set_dtls_state(DtlsTransportState state) {
+  if (dtls_state_ == state) {
+    return;
+  }
+  LOG_J(LS_VERBOSE, this) << "set_dtls_state from:" << dtls_state_ << " to "
+                          << state;
+  dtls_state_ = state;
+  SignalDtlsState(this, state);
+}
+
+bool TransportChannel::SetSrtpCryptoSuites(const std::vector<int>& ciphers) {
+  return false;
+}
+
+// TODO(guoweis): Remove this function once everything is moved away.
+bool TransportChannel::SetSrtpCiphers(const std::vector<std::string>& ciphers) {
+  std::vector<int> crypto_suites;
+  for (const auto cipher : ciphers) {
+    crypto_suites.push_back(rtc::SrtpCryptoSuiteFromName(cipher));
+  }
+  return SetSrtpCryptoSuites(crypto_suites);
+}
+
+}  // namespace cricket