Bug 1187851 followup - Fix DEBUG-only code to print name of nsChangeH…

…int_UpdateContainingBlock. No review.

48d5d4b398c2 (Bug 1187851 patch 3) renamed this change hint, but didn't
fix the code that prints change hints when debugging.

This is particularly confusing since 5fd6dd2bdbfa (Bug 1301500)
reintroduced a different change hint with that name.

layout/base/RestyleManager.cpp

@@ -448,7 +448,7 @@ RestyleManager::ChangeHintToString(nsChangeHint aHint)
     "UpdateTransformLayer", "ReconstructFrame", "UpdateOverflow",
     "UpdateSubtreeOverflow", "UpdatePostTransformOverflow",
     "UpdateParentOverflow",
-    "ChildrenOnlyTransform", "RecomputePosition", "AddOrRemoveTransform",
+    "ChildrenOnlyTransform", "RecomputePosition", "UpdateContainingBlock",
     "BorderStyleNoneChange", "UpdateTextPath", "SchedulePaint",
     "NeutralChange", "InvalidateRenderingObservers",
     "ReflowChangesSizeOrPosition", "UpdateComputedBSize",