Mojo: Add the beginnings of a proper embedder API.

mojo/system/embedder.cc

Index: mojo/system/embedder.cc
diff --git a/mojo/system/embedder.cc b/mojo/system/embedder.cc
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index 0000000000000000000000000000000000000000..b66fb2b61239e31efcdf850ebf0e2d0c2443eeda
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+++ b/mojo/system/embedder.cc
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+// 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/embedder.h"
+
+#include "mojo/system/core_impl.h"
+
+namespace mojo {
+namespace embedder {
+
+void Init() {
+  Core::Init(new system::CoreImpl());
+}
+
+}  // namespace embedder
+}  // namespace mojo