Revert "Speculative revert by sheriff"

cc/blink/web_display_item_list_impl.h

Index: cc/blink/web_display_item_list_impl.h
diff --git a/cc/blink/web_display_item_list_impl.h b/cc/blink/web_display_item_list_impl.h
index abaf221bba24491f41241360c459488c4cd1d200..ff94ee332eca768fb6955cf394f361ad638f1823 100644
--- a/cc/blink/web_display_item_list_impl.h
+++ b/cc/blink/web_display_item_list_impl.h
@@ -31,11 +31,9 @@ namespace cc_blink {
 
 class WebDisplayItemListImpl : public blink::WebDisplayItemList {
  public:
-  CC_BLINK_EXPORT WebDisplayItemListImpl();
+  CC_BLINK_EXPORT WebDisplayItemListImpl(cc::DisplayItemList* display_list);
   virtual ~WebDisplayItemListImpl();
 
-  scoped_refptr<cc::DisplayItemList> ToDisplayItemList();
-
   // blink::WebDisplayItemList implementation.
   virtual void appendDrawingItem(const SkPicture*);
   virtual void appendClipItem(
@@ -63,7 +61,7 @@ class WebDisplayItemListImpl : public blink::WebDisplayItemList {
   virtual void appendEndScrollItem();
 
  private:
-  scoped_refptr<cc::DisplayItemList> display_item_list_;
+  cc::DisplayItemList* display_item_list_;
 
   DISALLOW_COPY_AND_ASSIGN(WebDisplayItemListImpl);
 };