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

cc/trees/layer_tree_host_pixeltest_masks.cc

Index: cc/trees/layer_tree_host_pixeltest_masks.cc
diff --git a/cc/trees/layer_tree_host_pixeltest_masks.cc b/cc/trees/layer_tree_host_pixeltest_masks.cc
index 4b950136cb0ddb955a6dc6194153b1ea1195ea0b..73d2be4951d891a0d77f20c3d6170ff3daac429a 100644
--- a/cc/trees/layer_tree_host_pixeltest_masks.cc
+++ b/cc/trees/layer_tree_host_pixeltest_masks.cc
@@ -39,7 +39,7 @@ class MaskContentLayerClient : public ContentLayerClient {
   scoped_refptr<DisplayItemList> PaintContentsToDisplayList(
       PaintingControlSetting picture_control) override {
     SkPictureRecorder recorder;
-    skia::RefPtr<SkCanvas> canvas = skia::SharePtr(
+    sk_sp<SkCanvas> canvas = sk_ref_sp(
         recorder.beginRecording(gfx::RectToSkRect(gfx::Rect(bounds_))));
 
     SkPaint paint;
@@ -110,9 +110,7 @@ TEST_P(LayerTreeHostMasksPixelTest, ImageMaskOfLayer) {
       client.PaintContentsToDisplayList(
           ContentLayerClient::PAINTING_BEHAVIOR_NORMAL);
   mask_display_list->Raster(canvas, nullptr, gfx::Rect(mask_bounds), 1.0f);
-  skia::RefPtr<const SkImage> image =
-      skia::AdoptRef(surface->newImageSnapshot());
-  mask->SetImage(std::move(image));
+  mask->SetImage(skia::SharePtr(surface->makeImageSnapshot()));

[f(malita), 2016/04/21 15:45:47]

nit: ditto

 
   scoped_refptr<SolidColorLayer> green = CreateSolidColorLayerWithBorder(
       gfx::Rect(25, 25, 50, 50), kCSSGreen, 1, SK_ColorBLACK);
@@ -307,7 +305,7 @@ class CheckerContentLayerClient : public ContentLayerClient {
   scoped_refptr<DisplayItemList> PaintContentsToDisplayList(
       PaintingControlSetting picture_control) override {
     SkPictureRecorder recorder;
-    skia::RefPtr<SkCanvas> canvas = skia::SharePtr(
+    sk_sp<SkCanvas> canvas = sk_ref_sp(
         recorder.beginRecording(gfx::RectToSkRect(gfx::Rect(bounds_))));
 
     SkPaint paint;
@@ -351,7 +349,7 @@ class CircleContentLayerClient : public ContentLayerClient {
   scoped_refptr<DisplayItemList> PaintContentsToDisplayList(
       PaintingControlSetting picture_control) override {
     SkPictureRecorder recorder;
-    skia::RefPtr<SkCanvas> canvas = skia::SharePtr(
+    sk_sp<SkCanvas> canvas = sk_ref_sp(
         recorder.beginRecording(gfx::RectToSkRect(gfx::Rect(bounds_))));
 
     SkPaint paint;