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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_RENDERER_HOST_NAVIGATION_DISCARD_REASON_H_
#define CONTENT_BROWSER_RENDERER_HOST_NAVIGATION_DISCARD_REASON_H_
// Used to annotate the reason for calling into methods that delete speculative
// RenderFrameHosts or ongoing NavigationRequests. Purely informational for now,
// but in the future, intended to serve as a signal for how a caller of the
// functions should handle cases when the speculative RenderFrameHost cannot be
// promptly discarded. See https://crbug.com/1220337 for more info.
enum class NavigationDiscardReason {
// A new navigation will start and replace a pre-existing navigation. This
// resets any NavigationRequest and speculative RenderFrameHost on the
// targeted FrameTreeNode.
kNewNavigation,
// The FrameTreeNode the navigation targets is being removed, e.g. user closed
// the tab or script removed the frame owner element from its container
// document.
kWillRemoveFrame,
// Ongoing navigations have been cancelled, e.g. the user clicked Stop.
kCancelled,
// In certain cases when a navigation commits in a FrameTreeNode, other
// navigation attempts targeting the same FrameTreeNode are cancelled.
kCommittedNavigation,
// The render process is gone, typically due to a crash.
kRenderProcessGone,
// The RenderFrameHost containing the NavigationRequest is destructed.
// This is only used by the RenderFrameHost destructor, and typically other
// navigation cancellations will cancel the navigations on the RFH separately
// with a more specific reason before destructing the RenderFrameHost.
kRenderFrameHostDestruction,
};
#endif // CONTENT_BROWSER_RENDERER_HOST_NAVIGATION_DISCARD_REASON_H_
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