Bug 1305928 part 1 - Accept backdrop frame list in MathML container frame. r=dholbert

MozReview-Commit-ID: AJ8cRsDriDo
2016-10-01 13:42:41 +10:00
parent 35e38c96b8
commit 24e5e372ce
1 changed files with 6 additions and 3 deletions
--- a/layout/mathml/nsMathMLContainerFrame.h
+++ b/layout/mathml/nsMathMLContainerFrame.h
@@ -426,11 +426,14 @@ public:
  SetInitialChildList(ChildListID     aListID,
                      nsFrameList&    aChildList) override
  {
-    NS_ASSERTION(aListID == kPrincipalList, "unexpected frame list");
+    MOZ_ASSERT(aListID == kPrincipalList || aListID == kBackdropList,
+               "unexpected frame list");
    nsBlockFrame::SetInitialChildList(aListID, aChildList);
+    if (aListID == kPrincipalList) {
      // re-resolve our subtree to set any mathml-expected data
      nsMathMLContainerFrame::RebuildAutomaticDataForChildren(this);
    }
+  }

  virtual void
  AppendFrames(ChildListID     aListID,