Migrate Cocoa QPA backend to use QRegularExpression

This patch updates the Cocoa QPA backend code to use QRegularExpression
in place of the deprecated QRegExp.

Change-Id: I6de2774975e63f8dbff6dad0a842f35c3c4b4f83
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

src/plugins/platforms/cocoa/qcocoafiledialoghelper.mm

@@ -63,7 +63,8 @@
 #include <qsysinfo.h>
 #include <qoperatingsystemversion.h>
 #include <qglobal.h>
-#include <QDir>
+#include <qdir.h>
+#include <qregularexpression.h>
 
 #include <qpa/qplatformnativeinterface.h>
 
@@ -509,9 +510,10 @@ static QString strippedText(QString s)
 
 - (QString)removeExtensions:(const QString &)filter
 {
-    QRegExp regExp(QString::fromLatin1(QPlatformFileDialogHelper::filterRegExp));
-    if (regExp.indexIn(filter) != -1)
-        return regExp.cap(1).trimmed();
+    QRegularExpression regExp(QString::fromLatin1(QPlatformFileDialogHelper::filterRegExp));
+    QRegularExpressionMatch match = regExp.match(filter);
+    if (match.hasMatch())
+        return match.captured(1).trimmed();
     return filter;
 }
 

src/plugins/platforms/cocoa/qcocoamenuitem.mm

@@ -49,6 +49,7 @@
 #include "qcocoaapplication.h" // for custom application category
 #include "qcocoamenuloader.h"
 #include <QtGui/private/qcoregraphics_p.h>
+#include <QtCore/qregularexpression.h>
 
 #include <QtCore/QDebug>
 
@@ -261,7 +262,8 @@ NSMenuItem *QCocoaMenuItem::sync()
             m_detectedRole = detectMenuRole(m_text);
             switch (m_detectedRole) {
             case QPlatformMenuItem::AboutRole:
-                if (m_text.indexOf(QRegExp(QString::fromLatin1("qt$"), Qt::CaseInsensitive)) == -1)
+                if (m_text.indexOf(QRegularExpression(QString::fromLatin1("qt$"),
+                                                      QRegularExpression::CaseInsensitiveOption)) == -1)
                     mergeItem = [loader aboutMenuItem];
                 else
                     mergeItem = [loader aboutQtMenuItem];