ALL: Make simpleSaveNames() a MetaEngineFeature

Added it into hasFeature() of all engines which returned `true` in
simpleSaveNames() before.

As mentioned in #788, SCI is not always using simple names, so it
doesn't have such feature now.

1 files changed, 2 insertions, 4 deletions

diff --git a/engines/gnap/detection.cpp b/engines/gnap/detection.cpp
index 523a8b6d1c..d92a037232 100644
--- a/engines/gnap/detection.cpp
+++ b/engines/gnap/detection.cpp
@@ -78,7 +78,6 @@ public:
 	virtual bool createInstance(OSystem *syst, Engine **engine, const ADGameDescription *desc) const;
 	virtual int getMaximumSaveSlot() const;
 	virtual SaveStateList listSaves(const char *target) const;
-	virtual bool simpleSaveNames() const;
 	SaveStateDescriptor querySaveMetaInfos(const char *target, int slot) const;
 	virtual void removeSaveState(const char *target, int slot) const;
 };
@@ -90,7 +89,8 @@ bool GnapMetaEngine::hasFeature(MetaEngineFeature f) const {
 		(f == kSupportsDeleteSave) ||
 		(f == kSavesSupportMetaInfo) ||
 		(f == kSavesSupportThumbnail) ||
-		(f == kSavesSupportCreationDate);
+		(f == kSavesSupportCreationDate) ||
+		(f == kSimpleSavesNames);
 }
 
 bool Gnap::GnapEngine::hasFeature(EngineFeature f) const {
@@ -142,8 +142,6 @@ SaveStateList GnapMetaEngine::listSaves(const char *target) const {
 	return saveList;
 }
 
-bool GnapMetaEngine::simpleSaveNames() const { return true; }
-
 SaveStateDescriptor GnapMetaEngine::querySaveMetaInfos(const char *target, int slot) const {
 	Common::String fileName = Common::String::format("%s.%03d", target, slot);
 	Common::InSaveFile *file = g_system->getSavefileManager()->openForLoading(fileName);