Extended implementation to use interface as arguments

third_party/WebKit/Source/bindings/templates/callback_function.h

 {% filter format_blink_cpp_source_code %}
 
 {% include 'copyright_block.txt' %}
 
 #ifndef {{v8_class}}_h
 #define {{v8_class}}_h
 
 {% for filename in header_includes %}
 #include "{{filename}}"
 {% endfor %}
 
 namespace blink {
 
 class ScriptState;
+{% for forward_declaration in forward_declarations %}
+class {{forward_declaration}};
+{% endfor %}
 
 class {{exported}}{{v8_class}} final : public GarbageCollectedFinalized<{{v8_class}}> {
 
 public:
     static {{v8_class}}* create(v8::Isolate* isolate, v8::Local<v8::Function> callback)
     {
         return new {{v8_class}}(isolate, callback);
     }
 
     ~{{v8_class}}() = default;
@@ skipping 16 matching lines @@
 private:
     {{v8_class}}(v8::Isolate* isolate, v8::Local<v8::Function>);
     ScopedPersistent<v8::Function> m_callback;
 };
 
 } // namespace blink
 
 #endif // {{v8_class}}_h
 
 {% endfilter %}{# format_blink_cpp_source_code #}