bindings: Don't throw a TypeError when 'null' is passed to nullable callback function

third_party/WebKit/Source/bindings/tests/results/modules/VoidCallbackFunctionModules.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file has been auto-generated by code_generator_v8.py.
 // DO NOT MODIFY!
 
 // This file has been generated from the Jinja2 template in
 // third_party/WebKit/Source/bindings/templates/callback_function.h.tmpl
 
 // clang-format off
 
 #ifndef VoidCallbackFunctionModules_h
 #define VoidCallbackFunctionModules_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "bindings/core/v8/TraceWrapperV8Reference.h"
 #include "modules/ModulesExport.h"
 #include "platform/heap/Handle.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class ScriptState;
 
 class MODULES_EXPORT VoidCallbackFunctionModules final : public GarbageCollectedFinalized<VoidCallbackFunctionModules>, public TraceWrapperBase {
  public:
-  static VoidCallbackFunctionModules* create(ScriptState* scriptState, v8::Local<v8::Function> callback)  {
-    return new VoidCallbackFunctionModules(scriptState, callback);
-  }
+  static VoidCallbackFunctionModules* create(ScriptState* scriptState, v8::Local<v8::Value> callback);
 
   ~VoidCallbackFunctionModules() = default;
 
   DECLARE_TRACE();
   DECLARE_TRACE_WRAPPERS();
 
   bool call(ScriptWrappable* scriptWrappable);
 
   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:
   VoidCallbackFunctionModules(ScriptState*, v8::Local<v8::Function>);
 
   RefPtr<ScriptState> m_scriptState;
   TraceWrapperV8Reference<v8::Function> m_callback;
 };
 
 }  // namespace blink
 
 #endif  // VoidCallbackFunctionModules_h