Mojo C++ bindings: expose serialization public API for mojo structs.

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

 {% from "enum_macros.tmpl" import enum_decl -%}
 
 class {{struct.name}} {
  public:
   using DataView = {{struct.name}}DataView;
   using Data_ = internal::{{struct.name}}_Data;
 
 {#--- Enums #}
 {%- for enum in struct.enums -%}
 {%-   if enum|is_native_only_kind %}
@@ skipping 34 matching lines @@
   {{struct.name}}Ptr Clone() const;
 
   // Equals() is a template so it is only instantiated if it is used. Thus, the
   // bindings generator does not need to know whether Equals() or == operator
   // are available for members.
   template <typename T,
             typename std::enable_if<std::is_same<
                 T, {{struct.name}}>::value>::type* = nullptr>
   bool Equals(const T& other) const;
 
+{%- set serialization_result_type = "mojo::WTFArray<uint8_t>"
+        if for_blink else "mojo::Array<uint8_t>" %}
+
+  template <typename UserType>
+  static {{serialization_result_type}} Serialize(UserType* input) {
+    return mojo::internal::StructSerializeImpl<
+        {{struct.name}}Ptr, {{serialization_result_type}}>(input);
+  }
+
+  template <typename UserType>
+  static bool Deserialize({{serialization_result_type}} input,
+                          UserType* output) {
+    return mojo::internal::StructDeserializeImpl<
+        {{struct.name}}Ptr, {{serialization_result_type}}>(
+            std::move(input), output);
+  }
+
 {#--- Struct members #}
 {%  for field in struct.fields %}
 {%-   set type = field.kind|cpp_wrapper_type %}
 {%-   set name = field.name %}
   {{type}} {{name}};
 {%- endfor %}
 };