Add SkSourceGammaTreatment enum so we know how to create mips

src/effects/SkTableColorFilter.cpp

Index: src/effects/SkTableColorFilter.cpp
diff --git a/src/effects/SkTableColorFilter.cpp b/src/effects/SkTableColorFilter.cpp
index 0994097e6a23a257b109d689ffaedb9d343949a8..e87a0537354f000cef90fb0c4bcbfe74fdf8841d 100644
--- a/src/effects/SkTableColorFilter.cpp
+++ b/src/effects/SkTableColorFilter.cpp
@@ -473,7 +473,8 @@ const GrFragmentProcessor* ColorTableEffect::Create(GrContext* context, SkBitmap
     SkAutoTUnref<GrTexture> texture;
     if (-1 == row) {
         atlas = nullptr;
-        texture.reset(GrRefCachedBitmapTexture(context, bitmap, GrTextureParams::ClampNoFilter()));
+        texture.reset(GrRefCachedBitmapTexture(context, bitmap, GrTextureParams::ClampNoFilter(),
+                                               SkSourceGammaTreatment::kRespect));
     } else {
         texture.reset(SkRef(atlas->getTexture()));
     }