Add an option to enable performance queries in gameini files, disable it by default

Source/Core/VideoCommon/Src/PerfQueryBase.cpp

@@ -1,3 +1,9 @@
 #include "PerfQueryBase.h"
+#include "VideoConfig.h"
 
 PerfQueryBase* g_perf_query = 0;
+
+bool PerfQueryBase::ShouldEmulate() const
+{
+	return g_ActiveConfig.bPerfQueriesEnable;
+}

Source/Core/VideoCommon/Src/PerfQueryBase.h

@@ -25,9 +25,12 @@ enum PerfQueryGroup
 class PerfQueryBase
 {
 public:
-	PerfQueryBase() {};
+	PerfQueryBase() {}
 	virtual ~PerfQueryBase() {}
 
+	// Checks if performance queries are enabled in the gameini configuration.
+	bool ShouldEmulate() const;
+
 	// Begin querying the specified value for the following host GPU commands
 	virtual void EnableQuery(PerfQueryGroup type) {}
 

Source/Core/VideoCommon/Src/VideoConfig.cpp

@@ -181,6 +181,7 @@ void VideoConfig::GameIniLoad(const char *ini_file)
 	iniFile.GetIfExists("Video", "PH_ZFar", &sPhackvalue[1]);
 	iniFile.GetIfExists("Video", "ZTPSpeedupHack", &bZTPSpeedHack);
 	iniFile.GetIfExists("Video", "UseBBox", &bUseBBox);
+	iniFile.GetIfExists("Video", "PerfQueriesEnable", &bPerfQueriesEnable);
 }
 
 void VideoConfig::VerifyValidity()

Source/Core/VideoCommon/Src/VideoConfig.h

@@ -108,6 +108,7 @@ struct VideoConfig
 	// Hacks
 	bool bEFBAccessEnable;
 	bool bDlistCachingEnable;
+	bool bPerfQueriesEnable;
 
 	bool bEFBCopyEnable;
 	bool bEFBCopyCacheEnable;