diff -r 000000000000 -r 6474c204b198 media/mtransport/transportlayer.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/media/mtransport/transportlayer.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,67 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Original author: ekr@rtfm.com
+#include "logging.h"
+#include "transportflow.h"
+#include "transportlayer.h"
+#include "nsThreadUtils.h"
+
+// Logging context
+namespace mozilla {
+
+MOZ_MTLOG_MODULE("mtransport")
+
+nsresult TransportLayer::Init() {
+  if (state_ != TS_NONE)
+    return state_ == TS_ERROR ? NS_ERROR_FAILURE : NS_OK;
+
+  nsresult rv = InitInternal();
+
+  if (!NS_SUCCEEDED(rv)) {
+    state_ = TS_ERROR;
+    return rv;
+  }
+  state_ = TS_INIT;
+
+  return NS_OK;
+}
+
+void TransportLayer::Inserted(TransportFlow *flow, TransportLayer *downward) {
+  downward_ = downward;
+  flow_id_ = flow->id();
+  MOZ_MTLOG(ML_DEBUG, LAYER_INFO << "Inserted: downward='" <<
+    (downward ? downward->id(): "none") << "'");
+
+  WasInserted();
+}
+
+void TransportLayer::SetState(State state, const char *file, unsigned line) {
+  if (state != state_) {
+    MOZ_MTLOG(state == TS_ERROR ? ML_ERROR : ML_DEBUG,
+              file << ":" << line << ": " <<
+              LAYER_INFO << "state " << state_ << "->" << state);
+    state_ = state;
+    SignalStateChange(this, state);
+  }
+}
+
+nsresult TransportLayer::RunOnThread(nsIRunnable *event) {
+  if (target_) {
+    nsIThread *thr;
+
+    DebugOnly<nsresult> rv = NS_GetCurrentThread(&thr);
+    MOZ_ASSERT(NS_SUCCEEDED(rv));
+
+    if (target_ != thr) {
+      return target_->Dispatch(event, NS_DISPATCH_SYNC);
+    }
+  }
+
+  return event->Run();
+}
+
+}  // close namespace