Bug 1460526 - Don't attempt to do a partial rebuild when a sublist DAG gets too complex, always rebuild the whole display list. r=miko

MozReview-Commit-ID: 5u3sBSepgJa

--HG--
extra : rebase_source : f08034d384cac0353017ff6dd6fe4f152d77d48d
extra : source : 21ab7bb3b993f2b2778f9dde10ff16c3c20f320f

layout/painting/RetainedDisplayListBuilder.cpp

@@ -149,8 +149,7 @@ RetainedDisplayListBuilder::PreProcessDisplayList(RetainedDisplayList* aList,
 
     if (item->GetChildren()) {
       if (!PreProcessDisplayList(item->GetChildren(), SelectAGRForFrame(f, aAGR))) {
-        mBuilder.MarkFrameForDisplayIfVisible(f, mBuilder.RootReferenceFrame());
-        mBuilder.MarkFrameModifiedDuringBuilding(f);
+        return false;
       }
     }