Add mojo structs for ScopedFD and ScopedHandle.

mojo/common/invalid_typemapped_type.h

Index: mojo/common/invalid_typemapped_type.h
diff --git a/mojo/common/invalid_typemapped_type.h b/mojo/common/invalid_typemapped_type.h
new file mode 100644
index 0000000000000000000000000000000000000000..2f8b6a5d7e1d324ddbcd66de2c259641289b6f4f
--- /dev/null
+++ b/mojo/common/invalid_typemapped_type.h
@@ -0,0 +1,24 @@
+// 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.
+
+#ifndef MOJO_COMMON_INVALID_TYPEMAPPED_TYPE_H_
+#define MOJO_COMMON_INVALID_TYPEMAPPED_TYPE_H_
+
+namespace mojo {
+namespace common {
+
+struct InvalidTypemappedType {
+  InvalidTypemappedType() = default;
+
+  InvalidTypemappedType(InvalidTypemappedType&& other) = default;
+  InvalidTypemappedType& operator=(InvalidTypemappedType&& other) = default;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(InvalidTypemappedType);
+};
+
+}  // namespace common
+}  // namespace mojo
+
+#endif  // MOJO_COMMON_INVALID_TYPEMAPPED_TYPE_H_