Sync the WebSocket interface with the spec

Source/modules/websockets/DOMWebSocket.h

Index: Source/modules/websockets/DOMWebSocket.h
diff --git a/Source/modules/websockets/DOMWebSocket.h b/Source/modules/websockets/DOMWebSocket.h
index 473152bdc0990ba8a7ce282886e5440bd6580576..fba99dc93338239eb9fa58a3d642636f91bf2100 100644
--- a/Source/modules/websockets/DOMWebSocket.h
+++ b/Source/modules/websockets/DOMWebSocket.h
@@ -50,6 +50,7 @@ class Blob;
 class DOMArrayBuffer;
 class DOMArrayBufferView;
 class ExceptionState;
+class StringOrStringSequence;
 
 class DOMWebSocket : public RefCountedGarbageCollectedEventTargetWithInlineData<DOMWebSocket>, public ActiveDOMObject, public WebSocketChannelClient {
     DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(RefCountedGarbageCollected<DOMWebSocket>);
@@ -61,8 +62,7 @@ public:
     // lifetime management is designed assuming the V8 holds a ref on it while
     // hasPendingActivity() returns true.
     static DOMWebSocket* create(ExecutionContext*, const String& url, ExceptionState&);
-    static DOMWebSocket* create(ExecutionContext*, const String& url, const String& protocol, ExceptionState&);
-    static DOMWebSocket* create(ExecutionContext*, const String& url, const Vector<String>& protocols, ExceptionState&);
+    static DOMWebSocket* create(ExecutionContext*, const String& url, const StringOrStringSequence& protocols, ExceptionState&);
     virtual ~DOMWebSocket();
 
     enum State {