Inline old QNetworkAccessManager transferTimeout int overloads

Qt 6.7 introduced new std::chrono variants of the transfer
timeout functions. We can now inline the old 'int milliseconds'
functions to reduce the  number of DLL entry points when one
isn't needed.

Task-number: QTBUG-122023
Change-Id: I18e0ed424fa4da1dde67c811e0f3744edf24b5f8
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

src/network/access/qnetworkaccessmanager.cpp

@@ -1425,29 +1425,23 @@ void QNetworkAccessManager::setAutoDeleteReplies(bool shouldAutoDelete)
 }
 
 /*!
+    \fn int QNetworkAccessManager::transferTimeout() const
     \since 5.15
 
     Returns the timeout used for transfers, in milliseconds.
 
     \sa setTransferTimeout()
 */
-int QNetworkAccessManager::transferTimeout() const
-{
-    return int(d_func()->transferTimeout.count());
-}
 
 /*!
+    \fn void QNetworkAccessManager::setTransferTimeout(int timeout)
     \since 5.15
 
     Sets \a timeout as the transfer timeout in milliseconds.
 
     \sa setTransferTimeout(std::chrono::milliseconds),
         transferTimeout(), transferTimeoutAsDuration()
 */
-void QNetworkAccessManager::setTransferTimeout(int timeout)
-{
-    setTransferTimeout(std::chrono::milliseconds(timeout));
-}
 
 /*!
     \since 6.7

src/network/access/qnetworkaccessmanager.h

@@ -111,7 +111,9 @@ class Q_NETWORK_EXPORT QNetworkAccessManager: public QObject
     bool autoDeleteReplies() const;
     void setAutoDeleteReplies(bool autoDelete);
 
+    QT_NETWORK_INLINE_SINCE(6, 8)
     int transferTimeout() const;
+    QT_NETWORK_INLINE_SINCE(6, 8)
     void setTransferTimeout(int timeout);
 
     std::chrono::milliseconds transferTimeoutAsDuration() const;
@@ -153,6 +155,18 @@ protected Q_SLOTS:
 #endif
 };
 
+#if QT_NETWORK_INLINE_IMPL_SINCE(6, 8)
+int QNetworkAccessManager::transferTimeout() const
+{
+    return int(transferTimeoutAsDuration().count());
+}
+
+void QNetworkAccessManager::setTransferTimeout(int timeout)
+{
+    setTransferTimeout(std::chrono::milliseconds(timeout));
+}
+#endif // INLINE_SINCE 6.8
+
 QT_END_NAMESPACE
 
 #endif