cc: Make DisplayItemList::Append replay into an SkPicture

cc/test/solid_color_content_layer_client.cc

Index: cc/test/solid_color_content_layer_client.cc
diff --git a/cc/test/solid_color_content_layer_client.cc b/cc/test/solid_color_content_layer_client.cc
index 7e97bb8ae92d21da0ac0f387df41247bac191885..fe13526f5ea59734fecd149a4d2b0ed1fe90a6df 100644
--- a/cc/test/solid_color_content_layer_client.cc
+++ b/cc/test/solid_color_content_layer_client.cc
@@ -25,12 +25,11 @@ void SolidColorContentLayerClient::PaintContents(
       paint);
 }
 
-scoped_refptr<DisplayItemList>
-SolidColorContentLayerClient::PaintContentsToDisplayList(
+void SolidColorContentLayerClient::PaintContentsToDisplayList(
+    DisplayItemList* display_list,
     const gfx::Rect& clip,
     PaintingControlSetting painting_control) {
   NOTIMPLEMENTED();
-  return DisplayItemList::Create();
 }
 
 bool SolidColorContentLayerClient::FillsBoundsCompletely() const {