bindings: Store ScriptState in generated callback functions

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

 {% filter format_blink_cpp_source_code %}
 
 {% include 'copyright_block.txt' %}
 
 #ifndef {{cpp_class}}_h
 #define {{cpp_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}}{{cpp_class}} final : public GarbageCollectedFinalized<{{cpp_class}}>,
                                         public TraceWrapperBase {
 
 public:
-    static {{cpp_class}}* create(v8::Isolate* isolate, v8::Local<v8::Function> callback)
+    static {{cpp_class}}* create(ScriptState* scriptState, v8::Local<v8::Function> callback)
     {
-        return new {{cpp_class}}(isolate, callback);
+        return new {{cpp_class}}(scriptState, callback);
     }
 
     ~{{cpp_class}}() = default;
 
     DECLARE_TRACE();
     DECLARE_TRACE_WRAPPERS();
 
     bool call({{argument_declarations | join(', ')}});
 
     v8::Local<v8::Function> v8Value(v8::Isolate* isolate)
     {
         return m_callback.newLocal(isolate);
     }
 
     void setWrapperReference(v8::Isolate* isolate, const v8::Persistent<v8::Object>& wrapper)
     {
         DCHECK(!m_callback.isEmpty());
         m_callback.setReference(wrapper, isolate);
     }
 
 private:
-    {{cpp_class}}(v8::Isolate* isolate, v8::Local<v8::Function>);
+    {{cpp_class}}(ScriptState*, v8::Local<v8::Function>);
+
+    RefPtr<ScriptState> m_scriptState;
     ScopedPersistent<v8::Function> m_callback;
 };
 
 } // namespace blink
 
 #endif // {{cpp_class}}_h
 
 {% endfilter %}{# format_blink_cpp_source_code #}