stop using deprecated bitmap::config for gpu

include/gpu/SkGr.h

Index: include/gpu/SkGr.h
diff --git a/include/gpu/SkGr.h b/include/gpu/SkGr.h
index 2d0418bf089bb814ab9a52554e31ab5593c997d4..1f3c5affe444e9208fbf17faa74d237a9214f799 100644
--- a/include/gpu/SkGr.h
+++ b/include/gpu/SkGr.h
@@ -51,6 +51,11 @@ GR_STATIC_ASSERT((int)kIDA_GrBlendCoeff  == (int)SkXfermode::kIDA_Coeff);
  */
 GrPixelConfig SkBitmapConfig2GrPixelConfig(SkBitmap::Config);
 GrPixelConfig SkImageInfo2GrPixelConfig(SkColorType, SkAlphaType);
+
+static inline GrPixelConfig SkImageInfo2GrPixelConfig(const SkImageInfo& info) {
+    return SkImageInfo2GrPixelConfig(info.colorType(), info.alphaType());
+}
+
 bool GrPixelConfig2ColorType(GrPixelConfig, SkColorType*);
 
 static inline GrColor SkColor2GrColor(SkColor c) {