Create NavigationHandle after beforeunload with PlzNavigate.

content/browser/frame_host/navigator.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
 #include "content/browser/frame_host/navigation_handle_impl.h"
@@ skipping 130 matching lines @@
       const std::string& method,
       scoped_refptr<ResourceRequestBodyImpl> post_body,
       const std::string& extra_headers) {}
 
   // PlzNavigate
   // Called after receiving a BeforeUnloadACK IPC from the renderer. If
   // |frame_tree_node| has a NavigationRequest waiting for the renderer
   // response, then the request is either started or canceled, depending on the
   // value of |proceed|.
   virtual void OnBeforeUnloadACK(FrameTreeNode* frame_tree_node,
-                                 bool proceed) {}
+                                 bool proceed,
+                                 const base::TimeTicks& proceed_time) {}
 
   // PlzNavigate
   // Used to start a new renderer-initiated navigation, following a
   // BeginNavigation IPC from the renderer.
   virtual void OnBeginNavigation(FrameTreeNode* frame_tree_node,
                                  const CommonNavigationParams& common_params,
                                  const BeginNavigationParams& begin_params);
 
   // PlzNavigate
   // Used to abort an ongoing renderer-initiated navigation.
@@ skipping 16 matching lines @@
   virtual void LogResourceRequestTime(
     base::TimeTicks timestamp, const GURL& url) {};
 
   // Called to record the time it took to execute the before unload hook for the
   // current navigation.
   virtual void LogBeforeUnloadTime(
       const base::TimeTicks& renderer_before_unload_start_time,
       const base::TimeTicks& renderer_before_unload_end_time) {}
 
   // Called when a navigation has failed or the response is 204/205 to discard
-  // the pending entry in order to avoid url spoofs.
-  virtual void DiscardPendingEntryIfNeeded(NavigationHandleImpl* handle) {}
+  // the pending entry in order to avoid url spoofs. |expected_pending_entry_id|
+  // is the ID of the pending NavigationEntry at the start of the navigation.
+  // With sufficiently bad interleaving of IPCs, this may no longer be the
+  // pending NavigationEntry, in which case the pending NavigationEntry will not
+  // be discarded.
+  virtual void DiscardPendingEntryIfNeeded(int expected_pending_entry_id) {}
 
  protected:
   friend class base::RefCounted<Navigator>;
   virtual ~Navigator() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_H_