Convert //cc from scoped_ptr to std::unique_ptr.

cc/test/fake_picture_layer.cc

Index: cc/test/fake_picture_layer.cc
diff --git a/cc/test/fake_picture_layer.cc b/cc/test/fake_picture_layer.cc
index 143619ad4dc7d7c3ebd9f4e8b4ba796925bf2903..291342cdab21a39c7d8866740b13235ba66a80a3 100644
--- a/cc/test/fake_picture_layer.cc
+++ b/cc/test/fake_picture_layer.cc
@@ -18,7 +18,7 @@ FakePictureLayer::FakePictureLayer(ContentLayerClient* client)
 }
 
 FakePictureLayer::FakePictureLayer(ContentLayerClient* client,
-                                   scoped_ptr<RecordingSource> source)
+                                   std::unique_ptr<RecordingSource> source)
     : PictureLayer(client, std::move(source)),
       update_count_(0),
       push_properties_count_(0),
@@ -29,7 +29,7 @@ FakePictureLayer::FakePictureLayer(ContentLayerClient* client,
 
 FakePictureLayer::~FakePictureLayer() {}
 
-scoped_ptr<LayerImpl> FakePictureLayer::CreateLayerImpl(
+std::unique_ptr<LayerImpl> FakePictureLayer::CreateLayerImpl(
     LayerTreeImpl* tree_impl) {
   if (is_mask())
     return FakePictureLayerImpl::CreateMask(tree_impl, layer_id_);