Add NewRGB() with float gamma to SkColorSpace public API

tests/ColorSpaceTest.cpp

Index: tests/ColorSpaceTest.cpp
diff --git a/tests/ColorSpaceTest.cpp b/tests/ColorSpaceTest.cpp
index e9cc14ff45bf65d8db002c9d56955b3cd05209e7..aa0a33b40795b4e367448e661aabe2446cb82e3d 100644
--- a/tests/ColorSpaceTest.cpp
+++ b/tests/ColorSpaceTest.cpp
@@ -228,7 +228,7 @@ DEF_TEST(ColorSpace_Serialize, r) {
 
     const float gammas[] = { 1.1f, 1.2f, 1.7f, };
     SkMatrix44 toXYZ(SkMatrix44::kIdentity_Constructor);
-    test_serialize(r, SkColorSpace_Base::NewRGB(gammas, toXYZ).get(), false);
+    test_serialize(r, SkColorSpace::NewRGB(gammas, toXYZ).get(), false);
 
     SkColorSpaceTransferFn fn;
     fn.fA = 1.0f;
@@ -256,9 +256,9 @@ DEF_TEST(ColorSpace_Equals, r) {
     const float gammas1[] = { 1.1f, 1.2f, 1.3f, };
     const float gammas2[] = { 1.1f, 1.2f, 1.7f, };
     SkMatrix44 toXYZ(SkMatrix44::kIdentity_Constructor);
-    sk_sp<SkColorSpace> rgb1 = SkColorSpace_Base::NewRGB(gammas1, toXYZ);
-    sk_sp<SkColorSpace> rgb2 = SkColorSpace_Base::NewRGB(gammas2, toXYZ);
-    sk_sp<SkColorSpace> rgb3 = SkColorSpace_Base::NewRGB(gammas1, toXYZ);
+    sk_sp<SkColorSpace> rgb1 = SkColorSpace::NewRGB(gammas1, toXYZ);
+    sk_sp<SkColorSpace> rgb2 = SkColorSpace::NewRGB(gammas2, toXYZ);
+    sk_sp<SkColorSpace> rgb3 = SkColorSpace::NewRGB(gammas1, toXYZ);
 
     SkColorSpaceTransferFn fn;
     fn.fA = 1.0f;