Mojo: Add the ability to hook up a channel to the embedder API.

mojo/system/test_embedder.cc

Index: mojo/system/test_embedder.cc
diff --git a/mojo/system/test_embedder.cc b/mojo/system/test_embedder.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ca0b53458852b7fdd364ba41e916ce4d38fe8626
--- /dev/null
+++ b/mojo/system/test_embedder.cc
@@ -0,0 +1,26 @@
+// Copyright 2014 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/system/test_embedder.h"
+
+#include "base/logging.h"
+#include "mojo/system/core_impl.h"
+
+namespace mojo {
+namespace embedder {
+namespace test {
+
+void Shutdown() {
+  system::CoreImpl* core_impl = static_cast<system::CoreImpl*>(Core::Get());
+  CHECK(core_impl);
+  Core::Reset();
+
+  // TODO(vtl): Check for leaks, etc.
+
+  delete core_impl;
+}
+
+}  // namespace test
+}  // namespace embedder
+}  // namespace mojo