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

third_party/WebKit/Source/bindings/tests/results/core/VoidCallbackFunctionTypedef.cpp

Index: third_party/WebKit/Source/bindings/tests/results/core/VoidCallbackFunctionTypedef.cpp
diff --git a/third_party/WebKit/Source/bindings/tests/results/core/VoidCallbackFunctionTypedef.cpp b/third_party/WebKit/Source/bindings/tests/results/core/VoidCallbackFunctionTypedef.cpp
index cfeb99b9fff13e99ab23334da9cc5390eb49359f..1037060f0df78749fa06485aa4ed1bf199d1f3f4 100644
--- a/third_party/WebKit/Source/bindings/tests/results/core/VoidCallbackFunctionTypedef.cpp
+++ b/third_party/WebKit/Source/bindings/tests/results/core/VoidCallbackFunctionTypedef.cpp
@@ -21,6 +21,13 @@
 
 namespace blink {
 
+// static
+VoidCallbackFunctionTypedef* VoidCallbackFunctionTypedef::create(ScriptState* scriptState, v8::Local<v8::Value> callback){
+  if (isUndefinedOrNull(callback))
+    return nullptr;
+  return new VoidCallbackFunctionTypedef(scriptState, v8::Local<v8::Function>::Cast(callback));
+}
+
 VoidCallbackFunctionTypedef::VoidCallbackFunctionTypedef(ScriptState* scriptState, v8::Local<v8::Function> callback)
     : m_scriptState(scriptState),
     m_callback(scriptState->isolate(), this, callback) {