Cache the inverse matrix on SkColorSpace. Rename xyz() to toXYZ().

tests/TestConfigParsing.cpp

Index: tests/TestConfigParsing.cpp
diff --git a/tests/TestConfigParsing.cpp b/tests/TestConfigParsing.cpp
index a68a52d8ff318f2ef414ba14580fc210a30092f0..80d240b4c7644dd4bd5a5c6a6d15be9efc474fff 100644
--- a/tests/TestConfigParsing.cpp
+++ b/tests/TestConfigParsing.cpp
@@ -125,8 +125,8 @@ DEF_TEST(ParseConfigs_DefaultConfigs, reporter) {
     REPORTER_ASSERT(reporter, configs[25]->asConfigGpu()->getColorType() == kRGBA_F16_SkColorType);
     REPORTER_ASSERT(reporter, configs[25]->asConfigGpu()->getColorSpace());
     REPORTER_ASSERT(reporter, configs[25]->asConfigGpu()->getColorSpace()->gammaIsLinear());
-    REPORTER_ASSERT(reporter, configs[25]->asConfigGpu()->getColorSpace()->xyz() ==
-                              srgbColorSpace->xyz());
+    REPORTER_ASSERT(reporter, configs[25]->asConfigGpu()->getColorSpace()->toXYZ() ==
+                              srgbColorSpace->toXYZ());
     REPORTER_ASSERT(reporter, configs[26]->asConfigGpu()->getColorType() == kN32_SkColorType);
     REPORTER_ASSERT(reporter, configs[26]->asConfigGpu()->getColorSpace() == srgbColorSpace.get());
     REPORTER_ASSERT(reporter, configs[33]->asConfigGpu()->getContextType() ==