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 673d6f796c8d49d3443e60d11d4479a2456178fc..8b5153722a9aa39849b173435a04031f597e4b36 100644
--- a/cc/playback/raster_source_unittest.cc
+++ b/cc/playback/raster_source_unittest.cc
@@ -11,7 +11,6 @@
 #include "cc/test/fake_recording_source.h"
 #include "cc/test/skia_common.h"
 #include "cc/tiles/software_image_decode_controller.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"
@@ -187,7 +186,7 @@ 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));
@@ -550,7 +549,7 @@ TEST(RasterSourceTest, ImageHijackCanvasRespectsSharedCanvasTransform) {
       FakeRecordingSource::CreateFilledRecordingSource(size);
 
   // 1. Paint the image.
-  skia::RefPtr<SkImage> image = CreateDiscardableImage(gfx::Size(5, 5));
+  sk_sp<SkImage> image = CreateDiscardableImage(gfx::Size(5, 5));
   recording_source->add_draw_image(image.get(), gfx::Point(0, 0));
 
   // 2. Cover everything in red.