cc: Make DisplayItemList::Append replay into an SkPicture

cc/blink/web_content_layer_impl.cc

Index: cc/blink/web_content_layer_impl.cc
diff --git a/cc/blink/web_content_layer_impl.cc b/cc/blink/web_content_layer_impl.cc
index 922422308d80bbbdad80d218e6d3d10342aa6dfc..6ba54d97b9335f9b5c644fff9722d6b85da892d4 100644
--- a/cc/blink/web_content_layer_impl.cc
+++ b/cc/blink/web_content_layer_impl.cc
@@ -77,9 +77,9 @@ WebContentLayerImpl::PaintContentsToDisplayList(
     const gfx::Rect& clip,
     cc::ContentLayerClient::PaintingControlSetting painting_control) {
   if (!client_)
-    return cc::DisplayItemList::Create();
+    return cc::DisplayItemList::Create(clip);
 
-  WebDisplayItemListImpl list;
+  WebDisplayItemListImpl list(clip);
   client_->paintContents(&list, clip, PaintingControlToWeb(painting_control));
   return list.ToDisplayItemList();
 }