EDK: Move DispatcherTransport to handle_transport.*.

mojo/edk/system/handle_transport.cc

Index: mojo/edk/system/handle_transport.cc
diff --git a/mojo/edk/system/handle_transport.cc b/mojo/edk/system/handle_transport.cc
new file mode 100644
index 0000000000000000000000000000000000000000..37925ea167b22bd7ae0d5e8df2597003d9518838
--- /dev/null
+++ b/mojo/edk/system/handle_transport.cc
@@ -0,0 +1,19 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "mojo/edk/system/handle_transport.h"
+
+#include "base/logging.h"
+
+namespace mojo {
+namespace system {
+
+void DispatcherTransport::End() {
+  DCHECK(dispatcher_);
+  dispatcher_->mutex_.Unlock();
+  dispatcher_ = nullptr;
+}
+
+}  // namespace system
+}  // namespace mojo