IDL: make optional arguments (without default) explicit sometimes

Source/bindings/tests/results/V8TestInterfaceNode.cpp

Index: Source/bindings/tests/results/V8TestInterfaceNode.cpp
diff --git a/Source/bindings/tests/results/V8TestInterfaceNode.cpp b/Source/bindings/tests/results/V8TestInterfaceNode.cpp
index ab822a9628064da9ea73b63050faadbac65cf01d..6fc9f24d7713420760fb3ab35aa2c9c66244771a 100644
--- a/Source/bindings/tests/results/V8TestInterfaceNode.cpp
+++ b/Source/bindings/tests/results/V8TestInterfaceNode.cpp
@@ -8,6 +8,7 @@
 #include "V8TestInterfaceNode.h"
 
 #include "bindings/core/v8/ExceptionState.h"
+#include "bindings/core/v8/Optional.h"
 #include "bindings/core/v8/V8AbstractEventListener.h"
 #include "bindings/core/v8/V8DOMConfiguration.h"
 #include "bindings/core/v8/V8EventListenerList.h"
@@ -249,17 +250,18 @@ static void perWorldBindingsTestInterfaceEmptyMethodMethodCallbackForMainWorld(c
 static void perWorldBindingsTestInterfaceEmptyMethodOptionalBooleanArgMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestInterfaceNode* impl = V8TestInterfaceNode::toNative(info.Holder());
-    bool optionalBooleanArgument;
+    bool optionalBooleanArgument = false;
+    bool optionalBooleanArgumentMissing = false;
     {
         v8::TryCatch block;
         V8RethrowTryCatchScope rethrow(block);
-        if (UNLIKELY(info.Length() <= 0)) {
-            v8SetReturnValueFast(info, WTF::getPtr(impl->perWorldBindingsTestInterfaceEmptyMethodOptionalBooleanArg()), impl);
-            return;
+        if (!info[0]->IsUndefined()) {
+            TONATIVE_VOID_INTERNAL(optionalBooleanArgument, info[0]->BooleanValue());
+        } else {
+            optionalBooleanArgumentMissing = true;
         }
-        TONATIVE_VOID_INTERNAL(optionalBooleanArgument, info[0]->BooleanValue());
     }
-    v8SetReturnValueFast(info, WTF::getPtr(impl->perWorldBindingsTestInterfaceEmptyMethodOptionalBooleanArg(optionalBooleanArgument)), impl);
+    v8SetReturnValueFast(info, WTF::getPtr(impl->perWorldBindingsTestInterfaceEmptyMethodOptionalBooleanArg(Optional<bool>(optionalBooleanArgument, optionalBooleanArgumentMissing))), impl);
 }
 
 static void perWorldBindingsTestInterfaceEmptyMethodOptionalBooleanArgMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
@@ -272,17 +274,18 @@ static void perWorldBindingsTestInterfaceEmptyMethodOptionalBooleanArgMethodCall
 static void perWorldBindingsTestInterfaceEmptyMethodOptionalBooleanArgMethodForMainWorld(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestInterfaceNode* impl = V8TestInterfaceNode::toNative(info.Holder());
-    bool optionalBooleanArgument;
+    bool optionalBooleanArgument = false;
+    bool optionalBooleanArgumentMissing = false;
     {
         v8::TryCatch block;
         V8RethrowTryCatchScope rethrow(block);
-        if (UNLIKELY(info.Length() <= 0)) {
-            v8SetReturnValueForMainWorld(info, WTF::getPtr(impl->perWorldBindingsTestInterfaceEmptyMethodOptionalBooleanArg()));
-            return;
+        if (!info[0]->IsUndefined()) {
+            TONATIVE_VOID_INTERNAL(optionalBooleanArgument, info[0]->BooleanValue());
+        } else {
+            optionalBooleanArgumentMissing = true;
         }
-        TONATIVE_VOID_INTERNAL(optionalBooleanArgument, info[0]->BooleanValue());
     }
-    v8SetReturnValueForMainWorld(info, WTF::getPtr(impl->perWorldBindingsTestInterfaceEmptyMethodOptionalBooleanArg(optionalBooleanArgument)));
+    v8SetReturnValueForMainWorld(info, WTF::getPtr(impl->perWorldBindingsTestInterfaceEmptyMethodOptionalBooleanArg(Optional<bool>(optionalBooleanArgument, optionalBooleanArgumentMissing))));
 }
 
 static void perWorldBindingsTestInterfaceEmptyMethodOptionalBooleanArgMethodCallbackForMainWorld(const v8::FunctionCallbackInfo<v8::Value>& info)