FrameDeletedObserver::FrameDeletedObserver(RenderFrameHost* owner_host)
    : impl_(new FrameTreeNodeObserverImpl(
          static_cast<RenderFrameHostImpl*>(owner_host)->frame_tree_node())) {}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.