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 811a74ff481d5b9cf429c78572f20bf2f999b0c1..d50a8a0f6f1a7cc1abd3bdea244a1783c4699e2e 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;
 };
 
@@ -270,6 +271,8 @@ protected:
     bool fConfigTextureSupport[kGrPixelConfigCnt];
 
 private:
+    virtual void onApplyOptionsOverrides(const GrContextOptions&) {};
+
     bool fSupressPrints : 1;
     bool fDrawPathMasksToCompressedTextureSupport : 1;