[bindings] partial interfaces should not violate componentization

Source/bindings/templates/partial_interface.cpp

Index: Source/bindings/templates/partial_interface.cpp
diff --git a/Source/bindings/templates/partial_interface.cpp b/Source/bindings/templates/partial_interface.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..cc5b852034949ac67aa4f9a0c083a235418b25cb
--- /dev/null
+++ b/Source/bindings/templates/partial_interface.cpp
@@ -0,0 +1,18 @@
+{% extends 'interface_base.cpp' %}
+
+{##############################################################################}
+{% block partial_interface %}
+void {{v8_class_or_partial}}::initialize()
+{
+    // Should be invoked from initModules.
+    {{v8_class}}::updateWrapperTypeInfo(
+        &{{v8_class_or_partial}}::install{{v8_class}}Template,
+        &{{v8_class_or_partial}}::installConditionallyEnabledMethods);
+    {% for method in methods %}
+    {% if method.overloads and method.overloads.has_partial_overloads %}
+    {{v8_class}}::register{{method.name | blink_capitalize}}MethodForPartialInterface(&{{cpp_class_or_partial}}V8Internal::{{method.name}}Method);
+    {% endif %}
+    {% endfor %}
+}
+
+{% endblock %}