use from/to_srgb

Change-Id: I256dd98e1e918943195772954bc114e54b9325cd
Reviewed-on: https://skia-review.googlesource.com/140564
Commit-Queue: Mike Klein <mtklein@chromium.org>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Mike Klein <mtklein@chromium.org>
Reviewed-by: Brian Osman <brianosman@google.com>
diff --git a/src/core/SkColorSpaceXformSteps.h b/src/core/SkColorSpaceXformSteps.h
index c052ff6..912ae8a 100644
--- a/src/core/SkColorSpaceXformSteps.h
+++ b/src/core/SkColorSpaceXformSteps.h
@@ -45,6 +45,8 @@
 
     Flags flags;
 
+    bool srcTF_is_sRGB,
+         dstTF_is_sRGB;
     SkColorSpaceTransferFn srcTF,     // Apply for linearize.
                            dstTFInv;  // Apply for encode.
     float src_to_dst_matrix[9];       // Apply this 3x3 column-major matrix for gamut_transform.