[bindings] Support is_explicit_nullable for method arguments.

Source/bindings/tests/results/core/V8TestInterface.cpp

Index: Source/bindings/tests/results/core/V8TestInterface.cpp
diff --git a/Source/bindings/tests/results/core/V8TestInterface.cpp b/Source/bindings/tests/results/core/V8TestInterface.cpp
index 76cfc1e031770654f621dd7a123a0f4e9d2b7e17..64a071f2e450de42ed97d3df292a8d58d0a5504c 100644
--- a/Source/bindings/tests/results/core/V8TestInterface.cpp
+++ b/Source/bindings/tests/results/core/V8TestInterface.cpp
@@ -1414,6 +1414,32 @@ static void staticPromiseMethodPartialOverload1Method(const v8::FunctionCallback
     v8SetReturnValue(info, TestInterfaceImplementation::staticPromiseMethodPartialOverload().v8Value());
 }
 
+static void methodWithExplicitNullableArgumentMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
+{
+    ExceptionState exceptionState(ExceptionState::ExecutionContext, "methodWithExplicitNullableArgument", "TestInterface", info.Holder(), info.GetIsolate());
+    TestInterfaceImplementation* impl = V8TestInterface::toImpl(info.Holder());
+    Nullable<Vector<ScriptValue>> arguments;
+    {
+        if (UNLIKELY(info.Length() <= 0)) {
+            impl->methodWithExplicitNullableArgument();
+            return;
+        }
+        if (!info[0]->IsNull()) {
+            arguments = toImplArray<ScriptValue>(info[0], 1, info.GetIsolate(), exceptionState);
+            if (exceptionState.throwIfNeeded())
+                return;
+        }
+    }
+    impl->methodWithExplicitNullableArgument(arguments);
+}
+
+static void methodWithExplicitNullableArgumentMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
+{
+    TRACE_EVENT_SET_SAMPLING_STATE("blink", "DOMMethod");
+    TestInterfaceImplementationV8Internal::methodWithExplicitNullableArgumentMethod(info);
+    TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
+}
+
 static void implementsVoidMethodMethod(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     TestInterfaceImplementation* impl = V8TestInterface::toImpl(info.Holder());
@@ -2075,6 +2101,7 @@ static const V8DOMConfiguration::MethodConfiguration V8TestInterfaceMethods[] =
     {"voidMethodTestEnumArg", TestInterfaceImplementationV8Internal::voidMethodTestEnumArgMethodCallback, 0, 1, V8DOMConfiguration::ExposedToAllScripts},
     {"voidMethod", TestInterfaceImplementationV8Internal::voidMethodMethodCallback, TestInterfaceImplementationV8Internal::voidMethodMethodCallbackForMainWorld, 0, V8DOMConfiguration::ExposedToAllScripts},
     {"alwaysExposedMethod", TestInterfaceImplementationV8Internal::alwaysExposedMethodMethodCallback, 0, 0, V8DOMConfiguration::ExposedToAllScripts},
+    {"methodWithExplicitNullableArgument", TestInterfaceImplementationV8Internal::methodWithExplicitNullableArgumentMethodCallback, 0, 0, V8DOMConfiguration::ExposedToAllScripts},
     {"implementsVoidMethod", TestInterfaceImplementationV8Internal::implementsVoidMethodMethodCallback, 0, 0, V8DOMConfiguration::ExposedToAllScripts},
     {"implementsComplexMethod", TestInterfaceImplementationV8Internal::implementsComplexMethodMethodCallback, 0, 2, V8DOMConfiguration::ExposedToAllScripts},
     {"implementsCustomVoidMethod", TestInterfaceImplementationV8Internal::implementsCustomVoidMethodMethodCallback, 0, 0, V8DOMConfiguration::ExposedToAllScripts},