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

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

-{% import "struct_macros.tmpl" as struct_macros -%}
-{%  import "interface_macros.tmpl" as interface_macros -%}
-{%- set header_guard = "%s_SYNC_H_"|
-        format(module.path|upper|replace("/","_")|replace(".","_")) -%}
-
-// NOTE: This file was generated by the Mojo bindings generator.
-#ifndef {{header_guard}}
-#define {{header_guard}}
-
-#include <stdint.h>
-
-#include "mojo/public/cpp/bindings/array.h"
-#include "mojo/public/cpp/bindings/callback.h"
-#include "mojo/public/cpp/bindings/interface_handle.h"
-#include "mojo/public/cpp/bindings/interface_request.h"
-#include "mojo/public/cpp/bindings/map.h"
-#include "mojo/public/cpp/bindings/message_validator.h"
-#include "mojo/public/cpp/bindings/string.h"
-#include "mojo/public/cpp/bindings/struct_ptr.h"
-#include "mojo/public/cpp/bindings/lib/synchronous_connector.h"
-#include "{{module.path}}-internal.h"
-#include "{{module.path}}-common.h"
-
-{%- for import in imports %}
-#include "{{import.module.path}}.h"
-{%- endfor %}
-
-{% for namespace in namespaces_as_array %}
-namespace {{namespace}} {
-{%- endfor %}
-
-// --- Synchronous interface declaration ---
-{%  for interface in interfaces %}
-class {{interface.name}}_SynchronousProxy;
-class {{interface.name}}_Synchronous
-  : public internal::{{interface.name}}_Base {
- public:
-  virtual ~{{interface.name}}_Synchronous() override {}
-  
-  using Proxy_ = {{interface.name}}_SynchronousProxy;
-
-{%-   for method in interface.methods %}
-  virtual bool {{method.name}}(
-      {{interface_macros.declare_sync_request_params(method)}})
-      {%- if method.response_parameters == None -%} const {%- endif -%}
-      = 0;
-{%-   endfor %}
-};
-
-class {{interface.name}}_SynchronousProxy
-    : public {{interface.name}}_Synchronous {
- public:
-  explicit {{interface.name}}_SynchronousProxy(
-      mojo::internal::SynchronousConnector* connector,
-      mojo::internal::MessageValidatorList&& validators);
-
-{%-   for method in interface.methods %}
-  bool {{method.name}}({{interface_macros.declare_sync_request_params(method)}})
-    {%- if method.response_parameters == None %} const {% endif %} override;
-{%-   endfor %}
-
- private:
-  // |connector_| is passed to us, and is not owned by us.
-  mojo::internal::SynchronousConnector* const connector_;
-  mojo::internal::MessageValidatorList const validators_;
-};
-{% endfor %}
-
-{%- for namespace in namespaces_as_array|reverse %}
-}  // namespace {{namespace}}
-{%- endfor %}
-
-#endif  // {{header_guard}}