[Extensions Bindings] Add native declarativeContent verification

extensions/renderer/api_binding_hooks.h

Index: extensions/renderer/api_binding_hooks.h
diff --git a/extensions/renderer/api_binding_hooks.h b/extensions/renderer/api_binding_hooks.h
index 54c3bfc058bfe73630fc63433613b153df5eb78e..0de3f29597f3a9d8d39bba4aea7038a15b8f8e75 100644
--- a/extensions/renderer/api_binding_hooks.h
+++ b/extensions/renderer/api_binding_hooks.h
@@ -70,6 +70,11 @@ class APIBindingHooks {
                          const std::string& event_name,
                          v8::Local<v8::Value>* event_out);
 
+  // Performs any extra initialization on the template.
+  void InitializeTemplate(v8::Isolate* isolate,
+                          v8::Local<v8::ObjectTemplate> object_template,
+                          const APITypeReferenceMap& type_refs);
+
   void SetDelegate(std::unique_ptr<APIBindingHooksDelegate> delegate);
 
  private: