Mojo C++ bindings: share DataView class between chromium and blink variants.

mojo/public/cpp/bindings/interface_data_view.h

+// 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_PUBLIC_CPP_BINDINGS_INTERFACE_DATA_VIEW_H_
+#define MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_DATA_VIEW_H_
+
+namespace mojo {
+
+// They are used for type identification purpose only.
+template <typename Interface>
+class AssociatedInterfacePtrInfoDataView {};
+
+template <typename Interface>
+class AssociatedInterfaceRequestDataView {};
+
+template <typename Interface>
+class InterfacePtrDataView {};
+
+template <typename Interface>
+class InterfaceRequestDataView {};
+
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_DATA_VIEW_H_