Use the correct signal to detect failed navigations

chrome/browser/extensions/extension_webnavigation_api.h

 // Copyright (c) 2010 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.
 
 // Defines the Chrome Extensions WebNavigation API functions for observing and
 // intercepting navigation events, as specified in
 // chrome/common/extensions/api/extension_api.json.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_WEBNAVIGATION_API_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_WEBNAVIGATION_API_H_
@@ skipping 20 matching lines @@
   ~FrameNavigationState();
 
   // True if navigation events for the given frame can be sent.
   bool CanSendEvents(int64 frame_id) const;
 
   // Starts to track a frame given by its |frame_id| showing the URL |url| in
   // a |tab_contents|.
   void TrackFrame(int64 frame_id,
                   const GURL& url,
                   bool is_main_frame,
+                  bool is_error_page,
                   const TabContents* tab_contents);
 
   // Returns the URL corresponding to a tracked frame given by its |frame_id|.
   GURL GetUrl(int64 frame_id) const;
 
   // True if the frame given by its |frame_id| is the main frame of its tab.
   bool IsMainFrame(int64 frame_id) const;
 
   // Marks a frame as in an error state.
   void ErrorOccurredInFrame(int64 frame_id);
@@ skipping 77 matching lines @@
   // Tracks the state of the frames we are sending events for.
   FrameNavigationState navigation_state_;
 
   // Used for tracking registrations to navigation notifications.
   NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionWebNavigationEventRouter);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_WEBNAVIGATION_API_H_