Remove the dependency of TransportChannel and TransportChannelImpl.

webrtc/p2p/base/dtlstransportchannel.cc

Index: webrtc/p2p/base/dtlstransportchannel.cc
diff --git a/webrtc/p2p/base/dtlstransportchannel.cc b/webrtc/p2p/base/dtlstransportchannel.cc
index 912b90e80b18c99a8fcc724b80b4cb0c6b2d66b3..9be856c6966813d5861c43ffefdec7d72e1ff15f 100644
--- a/webrtc/p2p/base/dtlstransportchannel.cc
+++ b/webrtc/p2p/base/dtlstransportchannel.cc
@@ -50,11 +50,10 @@ static bool IsRtpPacket(const char* data, size_t len) {
   return (len >= kMinRtpPacketLen && (u[0] & 0xC0) == 0x80);
 }
 
-StreamInterfaceChannel::StreamInterfaceChannel(TransportChannel* channel)
+StreamInterfaceChannel::StreamInterfaceChannel(IceTransportInternal* channel)
     : channel_(channel),
       state_(rtc::SS_OPEN),
-      packets_(kMaxPendingPackets, kMaxDtlsPacketLen) {
-}
+      packets_(kMaxPendingPackets, kMaxDtlsPacketLen) {}
 
 rtc::StreamResult StreamInterfaceChannel::Read(void* buffer,
                                                      size_t buffer_len,
@@ -103,8 +102,9 @@ void StreamInterfaceChannel::Close() {
 }
 
 DtlsTransportChannelWrapper::DtlsTransportChannelWrapper(
-    TransportChannelImpl* channel)
-    : TransportChannelImpl(channel->transport_name(), channel->component()),
+    IceTransportInternal* channel)
+    : transport_name_(channel->transport_name()),
+      component_(channel->component()),
       network_thread_(rtc::Thread::Current()),
       channel_(channel),
       downward_(NULL),
@@ -118,20 +118,6 @@ DtlsTransportChannelWrapper::DtlsTransportChannelWrapper(
       this, &DtlsTransportChannelWrapper::OnSentPacket);
   channel_->SignalReadyToSend.connect(this,
       &DtlsTransportChannelWrapper::OnReadyToSend);
-  channel_->SignalGatheringState.connect(
-      this, &DtlsTransportChannelWrapper::OnGatheringState);
-  channel_->SignalCandidateGathered.connect(
-      this, &DtlsTransportChannelWrapper::OnCandidateGathered);
-  channel_->SignalCandidatesRemoved.connect(
-      this, &DtlsTransportChannelWrapper::OnCandidatesRemoved);
-  channel_->SignalRoleConflict.connect(this,
-      &DtlsTransportChannelWrapper::OnRoleConflict);
-  channel_->SignalRouteChange.connect(this,
-      &DtlsTransportChannelWrapper::OnRouteChange);
-  channel_->SignalSelectedCandidatePairChanged.connect(
-      this, &DtlsTransportChannelWrapper::OnSelectedCandidatePairChanged);
-  channel_->SignalStateChanged.connect(
-      this, &DtlsTransportChannelWrapper::OnChannelStateChanged);
   channel_->SignalReceivingState.connect(this,
       &DtlsTransportChannelWrapper::OnReceivingState);
 }
@@ -683,52 +669,35 @@ bool DtlsTransportChannelWrapper::HandleDtlsPacket(const char* data,
   return downward_->OnPacketReceived(data, size);
 }
 
-void DtlsTransportChannelWrapper::OnGatheringState(
-    TransportChannelImpl* channel) {
-  RTC_DCHECK(channel == channel_);
-  SignalGatheringState(this);
-}
-
-void DtlsTransportChannelWrapper::OnCandidateGathered(
-    TransportChannelImpl* channel,
-    const Candidate& c) {
-  RTC_DCHECK(channel == channel_);
-  SignalCandidateGathered(this, c);
-}
-
-void DtlsTransportChannelWrapper::OnCandidatesRemoved(
-    TransportChannelImpl* channel,
-    const Candidates& candidates) {
-  RTC_DCHECK(channel == channel_);
-  SignalCandidatesRemoved(this, candidates);
-}
-
-void DtlsTransportChannelWrapper::OnRoleConflict(
-    TransportChannelImpl* channel) {
-  RTC_DCHECK(channel == channel_);
-  SignalRoleConflict(this);
-}
-
-void DtlsTransportChannelWrapper::OnRouteChange(
-    TransportChannel* channel, const Candidate& candidate) {
-  RTC_DCHECK(channel == channel_);
-  SignalRouteChange(this, candidate);
+void DtlsTransportChannelWrapper::set_receiving(bool receiving) {
+  if (receiving_ == receiving) {
+    return;
+  }
+  receiving_ = receiving;
+  SignalReceivingState(this);
 }
 
-void DtlsTransportChannelWrapper::OnSelectedCandidatePairChanged(
-    TransportChannel* channel,
-    CandidatePairInterface* selected_candidate_pair,
-    int last_sent_packet_id,
-    bool ready_to_send) {
-  RTC_DCHECK(channel == channel_);
-  SignalSelectedCandidatePairChanged(this, selected_candidate_pair,
-                                     last_sent_packet_id, ready_to_send);
+void DtlsTransportChannelWrapper::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 DtlsTransportChannelWrapper::OnChannelStateChanged(
-    TransportChannelImpl* channel) {
-  RTC_DCHECK(channel == channel_);
-  SignalStateChanged(this);
+void DtlsTransportChannelWrapper::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);
 }
 
 void DtlsTransportChannelWrapper::OnDtlsHandshakeError(