Update entry page type to include error pages when appropriate.

content/public/browser/web_contents_observer.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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_
 
 #include "base/process/kill.h"
 #include "base/process/process_handle.h"
 #include "content/common/content_export.h"
@@ skipping 136 matching lines @@
 
   // This method is invoked when the provisional load was successfully
   // committed.
   //
   // If the navigation only changed the reference fragment, or was triggered
   // using the history API (e.g. window.history.replaceState), we will receive
   // this signal without a prior DidStartProvisionalLoadForFrame signal.
   virtual void DidCommitProvisionalLoadForFrame(
       RenderFrameHost* render_frame_host,
       const GURL& url,
+      bool url_is_unreachable,
       ui::PageTransition transition_type) {}
 
   // This method is invoked when the provisional load failed.
   virtual void DidFailProvisionalLoad(
       RenderFrameHost* render_frame_host,
       const GURL& validated_url,
       int error_code,
       const base::string16& error_description) {}
 
   // If the provisional load corresponded to the main frame, this method is
@@ skipping 200 matching lines @@
   void ResetWebContents();
 
   WebContentsImpl* web_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsObserver);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_