PlzNavigate: stop navigations when opening a document for write

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 139 matching lines @@
                                  bool proceed) {}
 
   // 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
-  // Cancel a NavigationRequest for |frame_tree_node|. Called when
-  // |frame_tree_node| is destroyed.
-  virtual void CancelNavigation(FrameTreeNode* frame_tree_node) {}
+  // Used to abort an ongoing renderer-initiated navigation.
+  virtual void OnAbortNavigation(FrameTreeNode* frame_tree_node) {}
+
+  // PlzNavigate
+  // Cancel a NavigationRequest for |frame_tree_node|. If the request is
+  // renderer-initiated and |inform_renderer| is true, an IPC will be sent to
+  // the renderer process to inform it that the navigation it requested was
+  // cancelled.
+  virtual void CancelNavigation(FrameTreeNode* frame_tree_node,
+                                bool inform_renderer) {}
 
   // Called when the network stack started handling the navigation request
   // so that the |timestamp| when it happened can be recorded into an histogram.
   // The |url| is used to verify we're tracking the correct navigation.
   // TODO(carlosk): once PlzNavigate is the only navigation implementation
   // remove the URL parameter and rename this method to better suit its naming
   // conventions.
   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) {}
 
  protected:
   friend class base::RefCounted<Navigator>;
   virtual ~Navigator() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_H_