Replace many skia::RefPtr with sk_sp<> in cc/

cc/playback/raster_source_unittest.cc

Index: cc/playback/raster_source_unittest.cc
diff --git a/cc/playback/raster_source_unittest.cc b/cc/playback/raster_source_unittest.cc
index 7f0c0cfc76ed9d28947928303fc97f5e3e9447fa..5299d7be2e8b99db92b7d5d81ea16b2843c459df 100644
--- a/cc/playback/raster_source_unittest.cc
+++ b/cc/playback/raster_source_unittest.cc
@@ -10,7 +10,6 @@
 
 #include "cc/test/fake_recording_source.h"
 #include "cc/test/skia_common.h"
-#include "skia/ext/refptr.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkPixelRef.h"
 #include "third_party/skia/include/core/SkShader.h"
@@ -186,7 +185,7 @@ TEST(RasterSourceTest, PixelRefIteratorDiscardableRefsOneTile) {
   std::unique_ptr<FakeRecordingSource> recording_source =
       FakeRecordingSource::CreateFilledRecordingSource(layer_bounds);
 
-  skia::RefPtr<SkImage> discardable_image[2][2];
+  sk_sp<SkImage> discardable_image[2][2];
   discardable_image[0][0] = CreateDiscardableImage(gfx::Size(32, 32));
   discardable_image[0][1] = CreateDiscardableImage(gfx::Size(32, 32));
   discardable_image[1][1] = CreateDiscardableImage(gfx::Size(32, 32));