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..5e21ae9c4b85c080767518362fc8cd8adc65d70c 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"
@@ -305,10 +304,13 @@ 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)) {
-        m_state = CLOSED;
-        exceptionState.throwSecurityError("The port " + String::number(m_url.port()) + " is not allowed.");
-        return;
+
+    if (m_url.hasPort()) {
+        if (!Platform::current()->portAllowed(m_url.port())) {
+            m_state = CLOSED;
+            exceptionState.throwSecurityError("The port " + String::number(m_url.port()) + " is not allowed.");
+            return;
+        }
     }
 
     // FIXME: Convert this to check the isolated world's Content Security Policy once webkit.org/b/104520 is solved.