[mojo] Support native types with mojom wire format

mojo/public/tools/bindings/generators/cpp_templates/module.h.tmpl

 // 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.
 
 {%- if variant -%}
 {%-   set variant_path = "%s-%s"|format(module.path, variant) -%}
 {%- else -%}
 {%-   set variant_path = module.path -%}
 {%- endif -%}
 
@@ skipping 13 matching lines @@
 #include "mojo/public/cpp/bindings/callback.h"
 #include "mojo/public/cpp/bindings/interface_ptr.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "mojo/public/cpp/bindings/lib/control_message_handler.h"
 #include "mojo/public/cpp/bindings/lib/control_message_proxy.h"
 #include "mojo/public/cpp/bindings/map.h"
 #include "mojo/public/cpp/bindings/message_filter.h"
 #include "mojo/public/cpp/bindings/no_interface.h"
 #include "mojo/public/cpp/bindings/string.h"
 #include "mojo/public/cpp/bindings/struct_ptr.h"
+#include "mojo/public/cpp/bindings/struct_traits.h"
 #include "{{variant_path}}-internal.h"
 {%- for import in imports %}
 #include "{{import.module.path}}.h"
 {%- endfor %}
 {%- if variant %}
 #include "{{module.path}}.h"
 {%- endif %}
 
 {%- for namespace in namespaces_as_array %}
 namespace {{namespace}} {
@@ skipping 22 matching lines @@
 {#--- Interface Forward Declarations -#}
 {%  for interface in interfaces %}
 class {{interface.name}};
 using {{interface.name}}Ptr = mojo::InterfacePtr<{{interface.name}}>;
 using {{interface.name}}AssociatedPtr = mojo::AssociatedInterfacePtr<{{interface.name}}>;
 {%  endfor %}
 
 {#--- Struct Forward Declarations -#}
 {%  for struct in structs %}
 class {{struct.name}};
+class {{struct.name}}_Reader;
 {%    if struct|should_inline %}
 using {{struct.name}}Ptr = mojo::InlinedStructPtr<{{struct.name}}>;
 {%    else %}
 using {{struct.name}}Ptr = mojo::StructPtr<{{struct.name}}>;
 {%    endif %}
 {%  endfor %}
 
 {#--- Union Forward Declarations -#}
 {%  for union in unions %}
 class {{union.name}};
@@ skipping 67 matching lines @@
 {%- endif %}
 
 {%- if variant %}
 }  // namespace {{variant}}
 {%- endif %}
 {%- for namespace in namespaces_as_array|reverse %}
 }  // namespace {{namespace}}
 {%- endfor %}
 
 #endif  // {{header_guard}}