IDL: make optional arguments (without default) explicit sometimes

Source/modules/websockets/DOMWebSocket.cpp

Index: Source/modules/websockets/DOMWebSocket.cpp
diff --git a/Source/modules/websockets/DOMWebSocket.cpp b/Source/modules/websockets/DOMWebSocket.cpp
index 43d4d31973ee2af896a26305b4509d8907175069..8ffd515fd1c4c383465c77b67cd0546a8bf04c24 100644
--- a/Source/modules/websockets/DOMWebSocket.cpp
+++ b/Source/modules/websockets/DOMWebSocket.cpp
@@ -248,12 +248,6 @@ void DOMWebSocket::logError(const String& message)
     executionContext()->addConsoleMessage(ConsoleMessage::create(JSMessageSource, ErrorMessageLevel, message));
 }
 
-DOMWebSocket* DOMWebSocket::create(ExecutionContext* context, const String& url, ExceptionState& exceptionState)
-{
-    Vector<String> protocols;
-    return create(context, url, protocols, exceptionState);
-}
-
 DOMWebSocket* DOMWebSocket::create(ExecutionContext* context, const String& url, const Vector<String>& protocols, ExceptionState& exceptionState)
 {
     if (url.isNull()) {
@@ -274,7 +268,8 @@ DOMWebSocket* DOMWebSocket::create(ExecutionContext* context, const String& url,
 DOMWebSocket* DOMWebSocket::create(ExecutionContext* context, const String& url, const String& protocol, ExceptionState& exceptionState)
 {
     Vector<String> protocols;
-    protocols.append(protocol);
+    if (!protocol.isNull())
+        protocols.append(protocol);
     return create(context, url, protocols, exceptionState);
 }
 
@@ -447,19 +442,9 @@ void DOMWebSocket::send(Blob* binaryData, ExceptionState& exceptionState)
     m_channel->send(binaryData->blobDataHandle());
 }
 
-void DOMWebSocket::close(unsigned short code, const String& reason, ExceptionState& exceptionState)
-{
-    closeInternal(code, reason, exceptionState);
-}
-
-void DOMWebSocket::close(ExceptionState& exceptionState)
-{
-    closeInternal(WebSocketChannel::CloseEventCodeNotSpecified, String(), exceptionState);
-}
-
-void DOMWebSocket::close(unsigned short code, ExceptionState& exceptionState)
+void DOMWebSocket::close(Optional<unsigned short> optionalCode, const String& reason, ExceptionState& exceptionState)
 {
-    closeInternal(code, String(), exceptionState);
+    closeInternal(optionalCode.isMissing() ? WebSocketChannel::CloseEventCodeNotSpecified : optionalCode.get(), reason, exceptionState);
 }
 
 void DOMWebSocket::closeInternal(int code, const String& reason, ExceptionState& exceptionState)