guard rasterizer and drawlooper setters

tests/LayerRasterizerTest.cpp

Index: tests/LayerRasterizerTest.cpp
diff --git a/tests/LayerRasterizerTest.cpp b/tests/LayerRasterizerTest.cpp
index a81cca40370e440c96fd57996df5964b54e061e5..b71c305d59740a67d545db5a38e203780c3e87c6 100644
--- a/tests/LayerRasterizerTest.cpp
+++ b/tests/LayerRasterizerTest.cpp
@@ -49,7 +49,7 @@ SkFlattenable* DummyRasterizer::CreateProc(SkReadBuffer&) { return new DummyRast
 DEF_TEST(LayerRasterizer_destructor, reporter) {
     {
         SkPaint paint;
-        paint.setRasterizer(new DummyRasterizer)->unref();
+        paint.setRasterizer(sk_make_sp<DummyRasterizer>());
         REPORTER_ASSERT(reporter, DummyRasterizer::GetCount() == 1);
 
         SkLayerRasterizer::Builder builder;
@@ -81,7 +81,7 @@ static bool equals(const SkLayerRasterizer_Rec& rec1, const SkLayerRasterizer_Re
 
 DEF_TEST(LayerRasterizer_copy, reporter) {
     SkLayerRasterizer::Builder builder;
-    REPORTER_ASSERT(reporter, nullptr == builder.snapshotRasterizer());
+    REPORTER_ASSERT(reporter, nullptr == builder.snapshot());
     SkPaint paint;
     // Create a bunch of paints with different flags.
     for (uint32_t flags = 0x01; flags < SkPaint::kAllFlags; flags <<= 1) {
@@ -90,14 +90,14 @@ DEF_TEST(LayerRasterizer_copy, reporter) {
     }
 
     // Create a layer rasterizer with all the existing layers.
-    SkAutoTUnref<SkLayerRasterizer> firstCopy(builder.snapshotRasterizer());
+    sk_sp<SkLayerRasterizer> firstCopy(builder.snapshot());
 
     // Add one more layer.
     paint.setFlags(SkPaint::kAllFlags);
     builder.addLayer(paint);
 
-    SkAutoTUnref<SkLayerRasterizer> oneLarger(builder.snapshotRasterizer());
-    SkAutoTUnref<SkLayerRasterizer> detached(builder.detachRasterizer());
+    sk_sp<SkLayerRasterizer> oneLarger(builder.snapshot());
+    sk_sp<SkLayerRasterizer> detached(builder.detach());
 
     // Check the counts for consistency.
     const int largerCount = LayerRasterizerTester::CountLayers(*oneLarger.get());
@@ -140,5 +140,5 @@ DEF_TEST(LayerRasterizer_copy, reporter) {
 
 DEF_TEST(LayerRasterizer_detachEmpty, reporter) {
     SkLayerRasterizer::Builder builder;
-    REPORTER_ASSERT(reporter, nullptr == builder.detachRasterizer());
+    REPORTER_ASSERT(reporter, nullptr == builder.detach());
 }