Bindings generation emits (more) correct null checking

Source/bindings/dart/custom/DartFormDataCustom.cpp

 // Copyright 2011, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //    * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //    * Redistributions in binary form must reproduce the above
@@ skipping 19 matching lines @@
 #include "config.h"
 #include "DartFormData.h"
 
 #include "DartBlob.h"
 #include "DartHTMLFormElement.h"
 
 namespace WebCore {
 
 namespace DartFormDataInternal {
 
-void constructorCallback(Dart_NativeArguments args)
-{
-    Dart_Handle exception = 0;
-    {
-        HTMLFormElement* form = 0;
-        if (!Dart_IsNull(Dart_GetNativeArgument(args, 0))) {
-            form = DartHTMLFormElement::toNative(Dart_GetNativeArgument(args, 0), exception);
-            if (exception)
-                goto fail;
-        }
-
-        DartDOMWrapper::returnToDart<DartFormData>(args, DOMFormData::create(form));
-        return;
-    }
-
-fail:
-    Dart_ThrowException(exception);
-    ASSERT_NOT_REACHED();
-}
-
 void appendCallback(Dart_NativeArguments args)
 {
     Dart_Handle exception = 0;
     {
         DOMFormData* receiver = DartDOMWrapper::receiver<DOMFormData>(args);
 
         DartStringAdapter name = DartUtilities::dartToString(args, 1, exception);
         if (exception)
             goto fail;
 
         Dart_Handle arg2 = Dart_GetNativeArgument(args, 2);
 
         if (Dart_IsString(arg2)) {
             ASSERT(Dart_GetNativeArgumentCount(args) == 3);
 
             DartStringAdapter value = DartUtilities::dartToString(arg2, exception);
             if (exception)
                 goto fail;
 
             receiver->append(name, value);
             return;
         }
 
-        Blob* blob = DartBlob::toNative(arg2, exception);
+        Blob* blob = DartBlob::toNativeWithNullCheck(arg2, exception);
         if (exception)
             goto fail;
 
         if (Dart_GetNativeArgumentCount(args) == 3) {
             receiver->append(name, blob);
             return;
         }
 
         DartStringAdapter filename = DartUtilities::dartToStringWithNullCheck(args, 3, exception);
         if (exception)
             goto fail;
 
         receiver->append(name, blob, filename);
         return;
     }
 
 fail:
     Dart_ThrowException(exception);
     ASSERT_NOT_REACHED();
 }
 
 }
 
 }