Bindings generation emits (more) correct null checking

Source/bindings/dart/custom/DartNodeCustom.cpp

Index: Source/bindings/dart/custom/DartNodeCustom.cpp
diff --git a/Source/bindings/dart/custom/DartNodeCustom.cpp b/Source/bindings/dart/custom/DartNodeCustom.cpp
index bed16e61c65dfc7704faf2c5c282e6dfecfcc412..ba6b997f613e2d8fa1fa6023fb00b43412abc685 100644
--- a/Source/bindings/dart/custom/DartNodeCustom.cpp
+++ b/Source/bindings/dart/custom/DartNodeCustom.cpp
@@ -55,11 +55,11 @@ void insertBeforeCallback(Dart_NativeArguments args)
     {
         Node* receiver = DartDOMWrapper::receiver<Node>(args);
 
-        Node* newChild = DartNode::toNative(args, 1, exception);
+        Node* newChild = DartNode::toNativeWithNullCheck(args, 1, exception);
         if (exception)
             goto fail;
 
-        Node* refChild = DartNode::toNative(args, 2, exception);
+        Node* refChild = DartNode::toNativeWithNullCheck(args, 2, exception);
         if (exception)
             goto fail;
 
@@ -88,11 +88,11 @@ void replaceChildCallback(Dart_NativeArguments args)
     {
         Node* receiver = DartDOMWrapper::receiver<Node>(args);
 
-        Node* newChild = DartNode::toNative(args, 1, exception);
+        Node* newChild = DartNode::toNativeWithNullCheck(args, 1, exception);
         if (exception)
             goto fail;
 
-        Node* oldChild = DartNode::toNative(args, 2, exception);
+        Node* oldChild = DartNode::toNativeWithNullCheck(args, 2, exception);
         if (exception)
             goto fail;
 
@@ -121,7 +121,7 @@ void removeChildCallback(Dart_NativeArguments args)
     {
         Node* receiver = DartDOMWrapper::receiver<Node>(args);
 
-        Node* child = DartNode::toNative(args, 1, exception);
+        Node* child = DartNode::toNativeWithNullCheck(args, 1, exception);
         if (exception)
             goto fail;
 
@@ -150,7 +150,7 @@ void appendChildCallback(Dart_NativeArguments args)
     {
         Node* receiver = DartDOMWrapper::receiver<Node>(args);
 
-        Node* child = DartNode::toNative(args, 1, exception);
+        Node* child = DartNode::toNativeWithNullCheck(args, 1, exception);
         if (exception)
             goto fail;