IDL: make optional arguments (without default) explicit sometimes

Source/bindings/tests/results/V8TestInterfaceNamedConstructor.cpp

Index: Source/bindings/tests/results/V8TestInterfaceNamedConstructor.cpp
diff --git a/Source/bindings/tests/results/V8TestInterfaceNamedConstructor.cpp b/Source/bindings/tests/results/V8TestInterfaceNamedConstructor.cpp
index 7eb21867bbd4db3550068d473420e0e2b3e221d9..f9a5aee67400043c1c1ae60b4b568b8dd6652d0b 100644
--- a/Source/bindings/tests/results/V8TestInterfaceNamedConstructor.cpp
+++ b/Source/bindings/tests/results/V8TestInterfaceNamedConstructor.cpp
@@ -8,6 +8,7 @@
 #include "V8TestInterfaceNamedConstructor.h"
 
 #include "bindings/core/v8/ExceptionState.h"
+#include "bindings/core/v8/Optional.h"
 #include "bindings/core/v8/V8DOMConfiguration.h"
 #include "bindings/core/v8/V8HiddenValue.h"
 #include "bindings/core/v8/V8ObjectConstructor.h"
@@ -90,39 +91,47 @@ static void V8TestInterfaceNamedConstructorConstructorCallback(const v8::Functio
         return;
     }
     V8StringResource<> stringArg;
-    bool defaultUndefinedOptionalBooleanArg;
-    int defaultUndefinedOptionalLongArg;
-    V8StringResource<> defaultUndefinedOptionalStringArg;
+    bool optionalBooleanArg = false;
+    bool optionalBooleanArgMissing = false;
+    int optionalLongArg = 0;
+    bool optionalLongArgMissing = false;
+    V8StringResource<> optionalStringArg;
+    bool optionalStringArgMissing = false;
     V8StringResource<> defaultNullStringOptionalstringArg;
     V8StringResource<> optionalStringArg;
+    bool optionalStringArgMissing = false;
     {
         v8::TryCatch block;
         V8RethrowTryCatchScope rethrow(block);
         TOSTRING_VOID_INTERNAL(stringArg, info[0]);
-        TONATIVE_VOID_INTERNAL(defaultUndefinedOptionalBooleanArg, info[1]->BooleanValue());
-        TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(defaultUndefinedOptionalLongArg, toInt32(info[2], exceptionState), exceptionState);
-        TOSTRING_VOID_INTERNAL(defaultUndefinedOptionalStringArg, info[3]);
+        if (!info[1]->IsUndefined()) {
+            TONATIVE_VOID_INTERNAL(optionalBooleanArg, info[1]->BooleanValue());
+        } else {
+            optionalBooleanArgMissing = true;
+        }
+        if (!info[2]->IsUndefined()) {
+            TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(optionalLongArg, toInt32(info[2], exceptionState), exceptionState);
+        } else {
+            optionalLongArgMissing = true;
+        }
+        if (!info[3]->IsUndefined()) {
+            TOSTRING_VOID_INTERNAL(optionalStringArg, info[3]);
+        } else {
+            optionalStringArgMissing = true;
+        }
         if (!info[4]->IsUndefined()) {
             TOSTRING_VOID_INTERNAL(defaultNullStringOptionalstringArg, info[4]);
         } else {
             defaultNullStringOptionalstringArg = nullptr;
         }
-        if (UNLIKELY(info.Length() <= 5)) {
-            Document& document = *toDocument(currentExecutionContext(info.GetIsolate()));
-            RefPtr<TestInterfaceNamedConstructor> impl = TestInterfaceNamedConstructor::createForJSConstructor(document, stringArg, defaultUndefinedOptionalBooleanArg, defaultUndefinedOptionalLongArg, defaultUndefinedOptionalStringArg, defaultNullStringOptionalstringArg, exceptionState);
-            if (exceptionState.hadException()) {
-                exceptionState.throwIfNeeded();
-                return;
-            }
-            v8::Handle<v8::Object> wrapper = info.Holder();
-            V8DOMWrapper::associateObjectWithWrapper<V8TestInterfaceNamedConstructor>(impl.release(), &V8TestInterfaceNamedConstructorConstructor::wrapperTypeInfo, wrapper, info.GetIsolate(), WrapperConfiguration::Dependent);
-            v8SetReturnValue(info, wrapper);
-            return;
+        if (!info[5]->IsUndefined()) {
+            TOSTRING_VOID_INTERNAL(optionalStringArg, info[5]);
+        } else {
+            optionalStringArgMissing = true;
         }
-        TOSTRING_VOID_INTERNAL(optionalStringArg, info[5]);
     }
     Document& document = *toDocument(currentExecutionContext(info.GetIsolate()));
-    RefPtr<TestInterfaceNamedConstructor> impl = TestInterfaceNamedConstructor::createForJSConstructor(document, stringArg, defaultUndefinedOptionalBooleanArg, defaultUndefinedOptionalLongArg, defaultUndefinedOptionalStringArg, defaultNullStringOptionalstringArg, optionalStringArg, exceptionState);
+    RefPtr<TestInterfaceNamedConstructor> impl = TestInterfaceNamedConstructor::createForJSConstructor(document, stringArg, Optional<bool>(optionalBooleanArg, optionalBooleanArgMissing), Optional<int>(optionalLongArg, optionalLongArgMissing), Optional<V8StringResource<> >(optionalStringArg, optionalStringArgMissing), defaultNullStringOptionalstringArg, Optional<V8StringResource<> >(optionalStringArg, optionalStringArgMissing), exceptionState);
     if (exceptionState.hadException()) {
         exceptionState.throwIfNeeded();
         return;