Use the correct signal to detect failed navigations

chrome/browser/tab_contents/provisional_load_details.h

 // Copyright (c) 2006-2008 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 CHROME_BROWSER_TAB_CONTENTS_PROVISIONAL_LOAD_DETAILS_H_
 #define CHROME_BROWSER_TAB_CONTENTS_PROVISIONAL_LOAD_DETAILS_H_
 #pragma once
 
 #include <string>
 
@@ skipping 10 matching lines @@
 // TODO(brettw) this mostly duplicates
 // NavigationController::LoadCommittedDetails, it would be nice to unify these
 // somehow.
 class ProvisionalLoadDetails {
  public:
   ProvisionalLoadDetails(bool main_frame,
                          bool in_page_navigation,
                          const GURL& url,
                          const std::string& security_info,
                          bool is_filtered,
+                         bool is_error_page,
                          int64 frame_id);
   virtual ~ProvisionalLoadDetails() { }
 
   void set_error_code(int error_code) { error_code_ = error_code; }
   int error_code() const { return error_code_; }
 
   void set_transition_type(PageTransition::Type transition_type) {
     transition_type_ = transition_type;
   }
   PageTransition::Type transition_type() const {
     return transition_type_;
   }
 
   const GURL& url() const { return url_; }
 
   bool main_frame() const { return is_main_frame_; }
 
   bool in_page_navigation() const { return is_in_page_navigation_; }
 
   int ssl_cert_id() const { return ssl_cert_id_; }
 
   int ssl_cert_status() const { return ssl_cert_status_; }
 
   int ssl_security_bits() const { return ssl_security_bits_; }
 
   int ssl_connection_status() const { return ssl_connection_status_; }
 
   bool is_content_filtered() const { return is_content_filtered_; }
 
+  bool is_error_page() const { return is_error_page_; }
+
   int64 frame_id() const { return frame_id_; }
 
  private:
   int error_code_;
   PageTransition::Type transition_type_;
   GURL url_;
   bool is_main_frame_;
   bool is_in_page_navigation_;
   int ssl_cert_id_;
   int ssl_cert_status_;
   int ssl_security_bits_;
   int ssl_connection_status_;
   bool is_content_filtered_;
+  bool is_error_page_;
   int64 frame_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ProvisionalLoadDetails);
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_PROVISIONAL_LOAD_DETAILS_H_