Create swizzle table inside of glsl caps

include/gpu/GrCaps.h

Index: include/gpu/GrCaps.h
diff --git a/include/gpu/GrCaps.h b/include/gpu/GrCaps.h
index 6893dc7b5e03329ad103e29364ac020a95446433..9287556f009494ea8fbb642506962c81ef0de4ee 100644
--- a/include/gpu/GrCaps.h
+++ b/include/gpu/GrCaps.h
@@ -100,6 +100,7 @@ protected:
     PrecisionInfo fFloatPrecisions[kGrShaderTypeCount][kGrSLPrecisionCount];
 
 private:
+    virtual void onApplyOptionsOverrides(const GrContextOptions&) {};
     typedef SkRefCnt INHERITED;
 };
 
@@ -274,6 +275,8 @@ protected:
     bool fConfigTextureSupport[kGrPixelConfigCnt];
 
 private:
+    virtual void onApplyOptionsOverrides(const GrContextOptions&) {};
+
     bool fSupressPrints : 1;
     bool fDrawPathMasksToCompressedTextureSupport : 1;