Fix to respect --explicitly-allowed-ports command line option

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 ccf4d7f38900365194522e4dd85763a6fac176e1..e9762f7ea320687b250bf99890a3b75eb7c46231 100644
--- a/Source/modules/websockets/DOMWebSocket.cpp
+++ b/Source/modules/websockets/DOMWebSocket.cpp
@@ -53,7 +53,6 @@
 #include "platform/Logging.h"
 #include "platform/blob/BlobData.h"
 #include "platform/heap/Handle.h"
-#include "platform/weborigin/KnownPorts.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "public/platform/Platform.h"
 #include "wtf/Assertions.h"
@@ -305,7 +304,8 @@ void DOMWebSocket::connect(const String& url, const Vector<String>& protocols, E
         exceptionState.throwDOMException(SyntaxError, "The URL contains a fragment identifier ('" + m_url.fragmentIdentifier() + "'). Fragment identifiers are not allowed in WebSocket URLs.");
         return;
     }
-    if (!portAllowed(m_url)) {
+
+    if (!Platform::current()->portAllowed(m_url)) {
         m_state = CLOSED;
         exceptionState.throwSecurityError("The port " + String::number(m_url.port()) + " is not allowed.");
         return;