Mojo: Split public/cpp/system/core.h into pieces

mojo/public/cpp/system/functions.h

Index: mojo/public/cpp/system/functions.h
diff --git a/mojo/public/cpp/system/functions.h b/mojo/public/cpp/system/functions.h
new file mode 100644
index 0000000000000000000000000000000000000000..298bd0bd21c46c181765850912174bea338c1efc
--- /dev/null
+++ b/mojo/public/cpp/system/functions.h
@@ -0,0 +1,20 @@
+// Copyright 2013 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.
+
+#ifndef MOJO_PUBLIC_CPP_SYSTEM_FUNCTIONS_H_
+#define MOJO_PUBLIC_CPP_SYSTEM_FUNCTIONS_H_
+
+#include "mojo/public/c/system/functions.h"
+
+namespace mojo {
+
+// Standalone functions --------------------------------------------------------
+
+inline MojoTimeTicks GetTimeTicksNow() {
+  return MojoGetTimeTicksNow();
+}
+
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_CPP_SYSTEM_FUNCTIONS_H_