diff -r b72c6db6890b -r 5dc02b23752f src/network/access/qnetworkaccessbackend_p.h
--- a/src/network/access/qnetworkaccessbackend_p.h	Wed Jun 23 19:07:03 2010 +0300
+++ b/src/network/access/qnetworkaccessbackend_p.h	Tue Jul 06 15:10:48 2010 +0300
@@ -111,6 +111,9 @@
     //   socket).
 
     virtual void open() = 0;
+#ifndef QT_NO_BEARERMANAGEMENT
+    virtual bool start();
+#endif
     virtual void closeDownstreamChannel() = 0;
     virtual bool waitForDownstreamReadyRead(int msecs) = 0;
 
@@ -160,6 +163,10 @@
     // This will possibly enable buffering of the upload data.
     virtual bool needsResetableUploadData() { return false; }
 
+    // Returns true if backend is able to resume downloads.
+    virtual bool canResume() const { return false; }
+    virtual void setResumeOffset(quint64 offset) { Q_UNUSED(offset); }
+
 protected:
     // Create the device used for reading the upload data
     QNonContiguousByteDevice* createUploadByteDevice();
@@ -181,6 +188,7 @@
     void proxyAuthenticationRequired(const QNetworkProxy &proxy, QAuthenticator *auth);
 #endif
     void authenticationRequired(QAuthenticator *auth);
+    void cacheCredentials(QAuthenticator *auth);
     void metaDataChanged();
     void redirectionRequested(const QUrl &destination);
     void sslErrors(const QList<QSslError> &errors);
@@ -190,6 +198,7 @@
     friend class QNetworkAccessManager;
     friend class QNetworkAccessManagerPrivate;
     friend class QNetworkAccessBackendUploadIODevice;
+    friend class QNetworkReplyImplPrivate;
     QNetworkAccessManagerPrivate *manager;
     QNetworkReplyImplPrivate *reply;
 };