QtSupport: Replace QtVersionFactory::canCreate

... by a functor checking some ad-hoc custom structure content.

This effectively replaces one ugliness (access to qmake specific
variable via qmake specific ProFileEvaluator) by an indirection
layer with similarly ungeneric contents, but I like the latter
setup better.

Change-Id: Iaee07c992fce4aabee2f4eae32a2413d772fe945
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/ios/iosqtversionfactory.cpp

@@ -26,8 +26,6 @@
 #include "iosqtversionfactory.h"
 #include "iosqtversion.h"
 #include "iosconstants.h"
-#include <qtsupport/qtsupportconstants.h>
-#include <proparser/profileevaluator.h>
 
 namespace Ios {
 namespace Internal {
@@ -37,11 +35,10 @@ IosQtVersionFactory::IosQtVersionFactory()
     setQtVersionCreator([] { return new IosQtVersion; });
     setSupportedType(Constants::IOSQT);
     setPriority(90);
-}
 
-bool IosQtVersionFactory::canCreate(ProFileEvaluator *evaluator) const
-{
-    return evaluator->values("QMAKE_PLATFORM").contains("ios");
+    setRestrictionChecker([](const SetupData &setup) {
+        return setup.platforms.contains("ios");
+    });
 }
 
 } // Internal

src/plugins/ios/iosqtversionfactory.h

@@ -34,8 +34,6 @@ class IosQtVersionFactory : public QtSupport::QtVersionFactory
 {
 public:
     IosQtVersionFactory();
-
-    bool canCreate(ProFileEvaluator *evaluator) const override;
 };
 
 } // namespace Internal