Improve gfx::Transform StructTraits.

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

Index: mojo/public/tools/bindings/generators/cpp_templates/struct_declaration.tmpl
diff --git a/mojo/public/tools/bindings/generators/cpp_templates/struct_declaration.tmpl b/mojo/public/tools/bindings/generators/cpp_templates/struct_declaration.tmpl
index 28d63997b9d51ca1dc09cb840bed7c42a9c860be..8d3369167381407ca7d6e787f2b1f1857921d89b 100644
--- a/mojo/public/tools/bindings/generators/cpp_templates/struct_declaration.tmpl
+++ b/mojo/public/tools/bindings/generators/cpp_templates/struct_declaration.tmpl
@@ -48,7 +48,10 @@ class {{class_name}} {
 {%- endif %}
 
  private:
-  {{class_name}}();
+  {{class_name}}() {

[Fady Samuel, 2016/08/03 23:44:05]

Does inlining the constructor help here? Can you add these things to the
initializer list?

[yzshen1, 2016/08/03 23:58:14]

It doesn't help much actually. I saw some New() calls (line 5, which calls this
constructor) showed up in profiling. So I made this change.

I have changed to use initializer list. Thanks!

+    header_.num_bytes = sizeof(*this);
+    header_.version = {{struct.versions[-1].version}};
+  }
   ~{{class_name}}() = delete;
 };
 static_assert(sizeof({{class_name}}) == {{struct.versions[-1].num_bytes}},