Update entry page type to include error pages when appropriate.

chrome/browser/extensions/api/web_navigation/web_navigation_api.h

 // Copyright (c) 2012 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 the extension JSON API.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_WEB_NAVIGATION_WEB_NAVIGATION_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_WEB_NAVIGATION_WEB_NAVIGATION_API_H_
 
@@ skipping 48 matching lines @@
   virtual void AboutToNavigateRenderView(
       content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void DidStartProvisionalLoadForFrame(
       content::RenderFrameHost* render_frame_host,
       const GURL& validated_url,
       bool is_error_page,
       bool is_iframe_srcdoc) OVERRIDE;
   virtual void DidCommitProvisionalLoadForFrame(
       content::RenderFrameHost* render_frame_host,
       const GURL& url,
+      bool url_is_unreachable,
       ui::PageTransition transition_type) OVERRIDE;
   virtual void DidFailProvisionalLoad(
       content::RenderFrameHost* render_frame_host,
       const GURL& validated_url,
       int error_code,
       const base::string16& error_description) OVERRIDE;
   virtual void DocumentLoadedInFrame(
       content::RenderFrameHost* render_frame_host) OVERRIDE;
   virtual void DidFinishLoad(content::RenderFrameHost* render_frame_host,
                              const GURL& validated_url) OVERRIDE;
@@ skipping 156 matching lines @@
 
   // Created lazily upon OnListenerAdded.
   scoped_ptr<WebNavigationEventRouter> web_navigation_event_router_;
 
   DISALLOW_COPY_AND_ASSIGN(WebNavigationAPI);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_WEB_NAVIGATION_WEB_NAVIGATION_API_H_