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
+  // Used to abort an ongoing renderer-initiated navigation.
+  virtual void OnAbortNavigation(FrameTreeNode* frame_tree_node) {}
+
+  // PlzNavigate
   // Cancel a NavigationRequest for |frame_tree_node|. Called when
   // |frame_tree_node| is destroyed.
   virtual void CancelNavigation(FrameTreeNode* frame_tree_node) {}
 
   // 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.
@@ skipping 11 matching lines @@
   virtual void DiscardPendingEntryIfNeeded(NavigationHandleImpl* handle) {}
 
  protected:
   friend class base::RefCounted<Navigator>;
   virtual ~Navigator() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_H_