color: Use SkColorSpaceXform instead of QCMS for LUTs

cc/output/renderer_pixeltest.cc

Index: cc/output/renderer_pixeltest.cc
diff --git a/cc/output/renderer_pixeltest.cc b/cc/output/renderer_pixeltest.cc
index 7b1638d9aafa0c5d87b20069b8040e36fe169152..6e932e9a480b66e734e06853bfa10650e1b73417 100644
--- a/cc/output/renderer_pixeltest.cc
+++ b/cc/output/renderer_pixeltest.cc
@@ -3493,7 +3493,7 @@ TEST_P(ColorTransformPixelTest, Basic) {
   // and 4 bytes for LUT-based transforms (determined empirically).
   FuzzyPixelComparator comparator(false, 100.f, 0.f, 2.f, 2, 0);
   if (!transform->CanGetShaderSource())
-    comparator = FuzzyPixelComparator(false, 100.f, 0.f, 4.f, 4, 0);
+    comparator = FuzzyPixelComparator(false, 100.f, 0.f, 6.f, 6, 0);
   EXPECT_TRUE(RunPixelTest(&pass_list, &expected_output_colors, comparator));
 }