Revert of IDL: Treat undefined as missing for optional arguments with defaults

Source/bindings/tests/results/V8TestObject.cpp

Index: Source/bindings/tests/results/V8TestObject.cpp
diff --git a/Source/bindings/tests/results/V8TestObject.cpp b/Source/bindings/tests/results/V8TestObject.cpp
index 24c082091026bfac7b731e14e7c0d3294264d4da..0e64c0360929c3a48c083492a4d80dedd528cf2d 100644
--- a/Source/bindings/tests/results/V8TestObject.cpp
+++ b/Source/bindings/tests/results/V8TestObject.cpp
@@ -7280,7 +7280,7 @@
     {
         v8::TryCatch block;
         V8RethrowTryCatchScope rethrow(block);
-        if (!info[0]->IsUndefined()) {
+        if (info.Length() > 0) {
             TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(defaultByteStringArg, toByteString(info[0], exceptionState), exceptionState);
         } else {
             defaultByteStringArg = String("foo");
@@ -7301,7 +7301,7 @@
     TestObject* impl = V8TestObject::toNative(info.Holder());
     V8StringResource<> defaultStringArg;
     {
-        if (!info[0]->IsUndefined()) {
+        if (info.Length() > 0) {
             TOSTRING_VOID_INTERNAL(defaultStringArg, info[0]);
         } else {
             defaultStringArg = String("foo");
@@ -7327,17 +7327,17 @@
     {
         v8::TryCatch block;
         V8RethrowTryCatchScope rethrow(block);
-        if (!info[0]->IsUndefined()) {
+        if (info.Length() > 0) {
             TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(defaultLongArg, toInt32(info[0], exceptionState), exceptionState);
         } else {
             defaultLongArg = 10;
         }
-        if (!info[1]->IsUndefined()) {
+        if (info.Length() > 1) {
             TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(defaultLongLongArg, toInt64(info[1], exceptionState), exceptionState);
         } else {
             defaultLongLongArg = -10;
         }
-        if (!info[2]->IsUndefined()) {
+        if (info.Length() > 2) {
             TONATIVE_VOID_EXCEPTIONSTATE_INTERNAL(defaultUnsignedArg, toUInt32(info[2], exceptionState), exceptionState);
         } else {
             defaultUnsignedArg = 4294967295u;
@@ -7360,7 +7360,7 @@
     {
         v8::TryCatch block;
         V8RethrowTryCatchScope rethrow(block);
-        if (!info[0]->IsUndefined()) {
+        if (info.Length() > 0) {
             TONATIVE_VOID_INTERNAL(defaultDoubleArg, static_cast<double>(info[0]->NumberValue()));
         } else {
             defaultDoubleArg = 0.5;
@@ -7383,7 +7383,7 @@
     {
         v8::TryCatch block;
         V8RethrowTryCatchScope rethrow(block);
-        if (!info[0]->IsUndefined()) {
+        if (info.Length() > 0) {
             TONATIVE_VOID_INTERNAL(defaultBooleanArg, info[0]->BooleanValue());
         } else {
             defaultBooleanArg = true;
@@ -7406,7 +7406,7 @@
     {
         v8::TryCatch block;
         V8RethrowTryCatchScope rethrow(block);
-        if (!info[0]->IsUndefined()) {
+        if (info.Length() > 0) {
             TONATIVE_VOID_INTERNAL(defaultBooleanArg, info[0]->BooleanValue());
         } else {
             defaultBooleanArg = false;
@@ -7429,7 +7429,7 @@
     {
         v8::TryCatch block;
         V8RethrowTryCatchScope rethrow(block);
-        if (!info[0]->IsUndefined()) {
+        if (info.Length() > 0) {
             TONATIVE_VOID_INTERNAL(defaultStringArg, toByteString(info[0]));
         } else {
             defaultStringArg = nullptr;
@@ -7450,7 +7450,7 @@
     TestObject* impl = V8TestObject::toNative(info.Holder());
     V8StringResource<TreatNullAsNullString> defaultStringArg;
     {
-        if (!info[0]->IsUndefined()) {
+        if (info.Length() > 0) {
             TOSTRING_VOID_INTERNAL(defaultStringArg, info[0]);
         } else {
             defaultStringArg = nullptr;
@@ -7473,7 +7473,7 @@
     {
         v8::TryCatch block;
         V8RethrowTryCatchScope rethrow(block);
-        if (!info[0]->IsUndefined()) {
+        if (info.Length() > 0) {
             TONATIVE_VOID_INTERNAL(defaultTestInterfaceArg, V8TestInterface::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
         } else {
             defaultTestInterfaceArg = nullptr;
@@ -8030,7 +8030,7 @@
     {
         v8::TryCatch block;
         V8RethrowTryCatchScope rethrow(block);
-        if (!info[0]->IsUndefined()) {
+        if (info.Length() > 0) {
             TONATIVE_VOID_INTERNAL(testInterfaceEmptyOrNullArg, V8TestInterfaceEmpty::toNativeWithTypeCheck(info.GetIsolate(), info[0]));
         } else {
             testInterfaceEmptyOrNullArg = nullptr;