Make SkColorSpaceXform::New() take bare ptrs

tests/ColorSpaceXformTest.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Resources.h"
 #include "SkCodec.h"
 #include "SkCodecPriv.h"
 #include "SkColorPriv.h"
 #include "SkColorSpace.h"
 #include "SkColorSpace_Base.h"
 #include "SkColorSpaceXform.h"
 #include "Test.h"
 
 class ColorSpaceXformTest {
 public:
     static std::unique_ptr<SkColorSpaceXform> CreateIdentityXform(const sk_sp<SkGammas>& gammas) {
         // Logically we can pass any matrix here.  For simplicty, pass I(), i.e. D50 XYZ gamut.
         sk_sp<SkColorSpace> space(new SkColorSpace_Base(
                 nullptr, kNonStandard_SkGammaNamed, gammas, SkMatrix::I(), nullptr));
 
         // Use special testing entry point, so we don't skip the xform, even though src == dst.
-        return SlowIdentityXform(space);
+        return SlowIdentityXform(space.get());
     }
 };
 
 static bool almost_equal(int x, int y) {
     return SkTAbs(x - y) <= 1;
 }
 
 static void test_identity_xform(skiatest::Reporter* r, const sk_sp<SkGammas>& gammas) {
     // Arbitrary set of 10 pixels
     constexpr int width = 10;
@@ skipping 121 matching lines @@
 
     gammas->fGreenType = SkGammas::Type::kTable_Type;
     gammas->fGreenData.fTable.fSize = tableSize;
     gammas->fGreenData.fTable.fOffset = 0;
 
     gammas->fBlueType = SkGammas::Type::kParam_Type;
     gammas->fBlueData.fParamOffset = sizeof(float) * tableSize;
 
     test_identity_xform(r, gammas);
 }