serverUpgrade     509 Source/modules/websockets/WebSocketHandshake.cpp     const AtomicString& serverUpgrade = this->serverUpgrade();
serverUpgrade     513 Source/modules/websockets/WebSocketHandshake.cpp     if (serverUpgrade.isNull()) {
serverUpgrade     526 Source/modules/websockets/WebSocketHandshake.cpp     if (!equalIgnoringCase(serverUpgrade, "websocket")) {
serverUpgrade     527 Source/modules/websockets/WebSocketHandshake.cpp         m_failureReason = formatHandshakeFailureReason("'Upgrade' header value is not 'WebSocket': " + serverUpgrade);
serverUpgrade      89 Source/modules/websockets/WebSocketHandshake.h     const AtomicString& serverUpgrade() const;