IDL: initialize union member variables (to null/zero)

Source/bindings/tests/results/V8TestSpecialOperations.cpp

Index: Source/bindings/tests/results/V8TestSpecialOperations.cpp
diff --git a/Source/bindings/tests/results/V8TestSpecialOperations.cpp b/Source/bindings/tests/results/V8TestSpecialOperations.cpp
index a24ea47ed7bad5ad38641f07a24c7d8314a64271..ae1dc3471017dfd6e38ce3d724c5a620820df1ba 100644
--- a/Source/bindings/tests/results/V8TestSpecialOperations.cpp
+++ b/Source/bindings/tests/results/V8TestSpecialOperations.cpp
@@ -59,8 +59,8 @@ static void namedItemMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
     {
         TOSTRING_VOID_INTERNAL(name, info[0]);
     }
-    RefPtrWillBeRawPtr<Node> result0;
-    RefPtrWillBeRawPtr<NodeList> result1;
+    RefPtrWillBeRawPtr<Node> result0 = nullptr;
+    RefPtrWillBeRawPtr<NodeList> result1 = nullptr;
     impl->getItem(name, result0, result1);
     if (result0) {
         v8SetReturnValue(info, result0.release());
@@ -84,8 +84,8 @@ static void namedPropertyGetter(v8::Local<v8::String> name, const v8::PropertyCa
 {
     TestSpecialOperations* impl = V8TestSpecialOperations::toNative(info.Holder());
     AtomicString propertyName = toCoreAtomicString(name);
-    RefPtrWillBeRawPtr<Node> result0;
-    RefPtrWillBeRawPtr<NodeList> result1;
+    RefPtrWillBeRawPtr<Node> result0 = nullptr;
+    RefPtrWillBeRawPtr<NodeList> result1 = nullptr;
     impl->getItem(propertyName, result0, result1);
     if (!(result0 || result1))
         return;