Backed out changeset 8cce0046e302 (bug 1406482) for mozilla::EditorBase::InsertTextImpl crashes

MozReview-Commit-ID: G9jW217fO0v

editor/libeditor/EditorBase.cpp

@@ -2503,8 +2503,6 @@ EditorBase::InsertTextImpl(const nsAString& aStringToInsert,
   nsCOMPtr<nsINode> node = *aInOutNode;
   int32_t offset = *aInOutOffset;
 
-  MOZ_ASSERT(node->GetChildAt(offset) == aChildAtOffset);
-
   // In some cases, the node may be the anonymous div elemnt or a mozBR
   // element.  Let's try to look for better insertion point in the nearest
   // text node if there is.