bindings: Throw TypeError when required dictionary member is undefined

Source/bindings/tests/results/core/V8TestDictionaryDerived.cpp

Index: Source/bindings/tests/results/core/V8TestDictionaryDerived.cpp
diff --git a/Source/bindings/tests/results/core/V8TestDictionaryDerived.cpp b/Source/bindings/tests/results/core/V8TestDictionaryDerived.cpp
index 95eee379d586117f4fdb7b2ca033ee9cc9579bab..91e3a2328c61a39a06f337ab1cf68fd67cad9703 100644
--- a/Source/bindings/tests/results/core/V8TestDictionaryDerived.cpp
+++ b/Source/bindings/tests/results/core/V8TestDictionaryDerived.cpp
@@ -55,6 +55,21 @@ void V8TestDictionaryDerivedImplementedAs::toImpl(v8::Isolate* isolate, v8::Loca
         impl.setDerivedStringMemberWithDefault(derivedStringMemberWithDefault);
     }
 
+    v8::Local<v8::Value> requiredLongMemberValue = v8Object->Get(v8String(isolate, "requiredLongMember"));
+    if (block.HasCaught()) {
+        exceptionState.rethrowV8Exception(block.Exception());
+        return;
+    }
+    if (requiredLongMemberValue.IsEmpty() || requiredLongMemberValue->IsUndefined()) {
+        exceptionState.throwTypeError("required member requiredLongMember is undefined.");
+        return;
+    } else {
+        int requiredLongMember = toInt32(isolate, requiredLongMemberValue, NormalConversion, exceptionState);
+        if (exceptionState.hadException())
+            return;
+        impl.setRequiredLongMember(requiredLongMember);
+    }
+
 }
 
 v8::Local<v8::Value> toV8(const TestDictionaryDerivedImplementedAs& impl, v8::Local<v8::Object> creationContext, v8::Isolate* isolate)
@@ -77,6 +92,10 @@ void toV8TestDictionaryDerivedImplementedAs(const TestDictionaryDerivedImplement
         dictionary->Set(v8String(isolate, "derivedStringMemberWithDefault"), v8String(isolate, String("default string value")));
     }
 
+    if (impl.hasRequiredLongMember()) {
+        dictionary->Set(v8String(isolate, "requiredLongMember"), v8::Integer::New(isolate, impl.requiredLongMember()));
+    }
+
 }
 
 TestDictionaryDerivedImplementedAs NativeValueTraits<TestDictionaryDerivedImplementedAs>::nativeValue(v8::Isolate* isolate, v8::Local<v8::Value> value, ExceptionState& exceptionState)