Make the fuchsia mojo/public repo the source of truth.

mojo/public/tools/bindings/generators/cpp_templates/wrapper_class_declaration.tmpl

-{% from "enum_macros.tmpl" import enum_decl -%}
-class {{struct.name}} {
- public:
-  using Data_ = internal::{{struct.name}}_Data;
-
-{#--- Enums #}
-{%- for enum in struct.enums -%}
-  {{enum_decl(enum, is_static=true)|indent(2)}}
-{%- endfor %}
-
-{#--- Constants #}
-{%- for constant in struct.constants %}
-{%-   if constant.kind|is_integral_kind %}
-  static const {{constant.kind|cpp_pod_type}} {{constant.name}} = {{constant|constant_value}};
-{%-   else %}
-  static const {{constant.kind|cpp_pod_type}} {{constant.name}};
-{%-   endif %}
-{%- endfor %}
-
-  static {{struct.name}}Ptr New();
-
-  template <typename U>
-  static {{struct.name}}Ptr From(const U& u) {
-    return mojo::TypeConverter<{{struct.name}}Ptr, U>::Convert(u);
-  }
-
-  template <typename U>
-  U To() const {
-    return mojo::TypeConverter<U, {{struct.name}}>::Convert(*this);
-  }
-
-  {{struct.name}}();
-  ~{{struct.name}}();
-  
-  // Returns the number of bytes it would take to serialize this struct's data.
-  size_t GetSerializedSize() const;
-
-  // Returns true on successful serialization. On failure, part of the data may
-  // be serialized, until the point of failure. This API does not support
-  // serializing handles. If not null, |bytes_written| is set to the number of
-  // bytes written to |buf|, even if this function return false. 
-  //
-  // TODO(vardhan): For now, we return true for success. Should we define a
-  // public error type for serialization? Should we open up
-  // internal::ValidationError?
-  bool Serialize(void* buf, size_t buf_size, size_t* bytes_written = nullptr);
-
-  // Deserializes the given |buf| of size |buf_size| representing a serialized
-  // version of this struct. The buffer is validated before it is deserialized.
-  // Returns true on successful deserialization.
-  // TODO(vardhan): Recover the validation error if there is one?
-  bool Deserialize(void* buf, size_t buf_size);
-
-  // Deserializes the given |buf| representing a serialized version of this
-  // struct. The buffer is NOT validated before it is deserialized, so the user
-  // must be confident of its validity and that |buf| points to enough data to
-  // finish deserializing.
-  void DeserializeWithoutValidation(void* buf);
-
-{%  if struct|is_cloneable_kind %}
-  {{struct.name}}Ptr Clone() const;
-{%- endif %}
-  bool Equals(const {{struct.name}}& other) const;
-
-{#--- Struct members #}
-{%  for field in struct.fields %}
-{%-   set type = field.kind|cpp_wrapper_type %}
-{%-   set name = field.name %}
-  {{type}} {{name}};
-{%- endfor %}
-};
-
-{#--- Enum Operators #}
-{% from "enum_macros.tmpl" import global_enum_operators_decl -%}
-{%- for enum in struct.enums %}
-  {{global_enum_operators_decl(enum, class_name=struct.name)}}
-{%- endfor %}