Mojo C++ Bindings: fix mojom::Foo::Deserialize() for component build.

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

Index: mojo/public/tools/bindings/generators/cpp_templates/wrapper_class_definition.tmpl
diff --git a/mojo/public/tools/bindings/generators/cpp_templates/wrapper_class_definition.tmpl b/mojo/public/tools/bindings/generators/cpp_templates/wrapper_class_definition.tmpl
index e75543f14eb3cee51949ab24509796225847e8d9..ab8c22d49cd2db24e0515f8b000c6b840ad737b1 100644
--- a/mojo/public/tools/bindings/generators/cpp_templates/wrapper_class_definition.tmpl
+++ b/mojo/public/tools/bindings/generators/cpp_templates/wrapper_class_definition.tmpl
@@ -31,3 +31,9 @@ size_t {{struct.name}}::Hash(size_t seed) const {
   return seed;
 }
 {%- endif %}
+
+bool {{struct.name}}::Validate(
+    const void* data,
+    mojo::internal::ValidationContext* validation_context) {
+  return Data_::Validate(data, validation_context);
+}