Add whitelist parameter to refEncodedData

src/gpu/SkGrPriv.h

Index: src/gpu/SkGrPriv.h
diff --git a/src/gpu/SkGrPriv.h b/src/gpu/SkGrPriv.h
index 46be3a53cfb0b322ab5832ac3867c338dc9fd46d..d98fe53a664769e073f93867395be3582da5899f 100644
--- a/src/gpu/SkGrPriv.h
+++ b/src/gpu/SkGrPriv.h
@@ -10,6 +10,7 @@
 
 #include "GrTypes.h"
 #include "GrBlend.h"
+#include "SkEncodedFormat.h"
 #include "SkImageInfo.h"
 #include "SkMatrix.h"
 #include "SkXfermode.h"
@@ -105,6 +106,11 @@ GrSurfaceDesc GrImageInfoToSurfaceDesc(const SkImageInfo&, const GrCaps&);
 bool GrPixelConfig2ColorAndProfileType(GrPixelConfig, SkColorType*, SkColorProfileType*);
 
 /**
+ *  Returns true if the specified encoded format might be supported on this GPU.
+ */
+bool GrIsCompressedFormatPossiblySupported(GrContext*, SkEncodedFormat);
+
+/**
  *  If the compressed data in the SkData is supported (as a texture format, this returns
  *  the pixel-config that should be used, and sets outStartOfDataToUpload to the ptr into
  *  the data where the actual raw data starts (skipping any header bytes).