Bug 969483 - Fix the RepositionChild function and add a test for it. r=BenWa

2014-02-18 16:38:30 -05:00
parent aa176d12a2
commit eb53e44708
2 changed files with 89 additions and 4 deletions
--- a/gfx/layers/Layers.cpp
+++ b/gfx/layers/Layers.cpp
@@ -813,9 +813,13 @@ ContainerLayer::RepositionChild(Layer* aChild, Layer* aAfter)
  }
  if (prev) {
    prev->SetNextSibling(next);
+  } else {
+    mFirstChild = next;
  }
  if (next) {
    next->SetPrevSibling(prev);
+  } else {
+    mLastChild = prev;
  }
  if (!aAfter) {
    aChild->SetPrevSibling(nullptr);