Refactored SkColorSpace and added in a Lab PCS GM

tests/SurfaceTest.cpp

Index: tests/SurfaceTest.cpp
diff --git a/tests/SurfaceTest.cpp b/tests/SurfaceTest.cpp
index 224e8c74cfc3ce1a03818b581799536db5ad2ead..7bef7bca268c96d38651e8cb643f730f5e598551 100644
--- a/tests/SurfaceTest.cpp
+++ b/tests/SurfaceTest.cpp
@@ -7,7 +7,7 @@
 
 #include <functional>
 #include "SkCanvas.h"
-#include "SkColorSpace_Base.h"
+#include "SkColorSpace_XYZTRC.h"
 #include "SkData.h"
 #include "SkDevice.h"
 #include "SkImage_Base.h"
@@ -921,9 +921,10 @@ static void test_surface_creation_and_snapshot_with_color_space(
 
     auto srgbColorSpace = SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named);
     auto adobeColorSpace = SkColorSpace::NewNamed(SkColorSpace::kAdobeRGB_Named);
-    SkMatrix44 srgbMatrix = as_CSB(srgbColorSpace)->toXYZD50();
+    const SkMatrix44* srgbMatrix = as_CSB(srgbColorSpace)->requestToXYZD50();
+    SkASSERT(srgbMatrix);
     const float oddGamma[] = { 2.4f, 2.4f, 2.4f };
-    auto oddColorSpace = SkColorSpace_Base::NewRGB(oddGamma, srgbMatrix);
+    auto oddColorSpace = SkColorSpace_Base::NewRGB(oddGamma, *srgbMatrix);
     auto linearColorSpace = SkColorSpace::NewNamed(SkColorSpace::kSRGBLinear_Named);
 
     const struct {