[bindings] Let NativeValueTraits<T>::nativeValue be variadic function and merge various convers…

Source/core/inspector/InjectedScriptBase.cpp

Index: Source/core/inspector/InjectedScriptBase.cpp
diff --git a/Source/core/inspector/InjectedScriptBase.cpp b/Source/core/inspector/InjectedScriptBase.cpp
index 4e95872e3e94e5c50834c398ebc33dac98c00a4b..abc4f218cfc7066599bc1d86b67ea116254b5ade 100644
--- a/Source/core/inspector/InjectedScriptBase.cpp
+++ b/Source/core/inspector/InjectedScriptBase.cpp
@@ -166,7 +166,10 @@ void InjectedScriptBase::makeCall(ScriptFunctionCall& function, RefPtr<JSONValue
 
     ASSERT(!hadException);
     if (!hadException) {
-        *result = resultValue.toJSONValue(m_injectedScriptObject.scriptState());
+        ScriptState* scriptState = m_injectedScriptObject.scriptState();
+        ScriptState::Scope scope(scriptState);
+        NonThrowableExceptionState exceptionState;
+        *result = ScriptValue::to<JSONValuePtr>(scriptState->isolate(), resultValue, exceptionState);
         if (!*result)
             *result = JSONString::create(String::format("Object has too long reference chain(must not be longer than %d)", JSONValue::maxDepth));
     } else {