Revert of Change call-sites now that SkCanvas is not ref-counted

skia/ext/bitmap_platform_device_mac_unittest.cc

Index: skia/ext/bitmap_platform_device_mac_unittest.cc
diff --git a/skia/ext/bitmap_platform_device_mac_unittest.cc b/skia/ext/bitmap_platform_device_mac_unittest.cc
index 9d8020b0d6990aa23986119523380538bb52b9d9..b1f6ee74dab194fbcb6c7295996a3f66e0aea036 100644
--- a/skia/ext/bitmap_platform_device_mac_unittest.cc
+++ b/skia/ext/bitmap_platform_device_mac_unittest.cc
@@ -32,8 +32,7 @@
   SkMatrix transform;
   transform.setTranslate(50, 140);
 
-  std::unique_ptr<SkCanvas> canvas =
-      skia::CreateCanvas(bitmap_, CRASH_ON_FAILURE);
+  sk_sp<SkCanvas> canvas(skia::CreateCanvas(bitmap_, CRASH_ON_FAILURE));
   canvas->setMatrix(transform);
 
   ScopedPlatformPaint p(canvas.get());
@@ -51,8 +50,7 @@
   SkMatrix transform;
   transform.setScale(0.5, 0.5);
 
-  std::unique_ptr<SkCanvas> canvas =
-      skia::CreateCanvas(bitmap_, CRASH_ON_FAILURE);
+  sk_sp<SkCanvas> canvas(skia::CreateCanvas(bitmap_, CRASH_ON_FAILURE));
   canvas->setMatrix(transform);
 
   ScopedPlatformPaint p(canvas.get());