[New Tab Page] Change the mechanism to intercept online NTP errors

chrome/browser/profiles/profile_io_data.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 CHROME_BROWSER_PROFILES_PROFILE_IO_DATA_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_IO_DATA_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 10 matching lines @@
 #include "chrome/browser/io_thread.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/storage_partition_descriptor.h"
 #include "components/content_settings/core/common/content_settings_types.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/resource_context.h"
 #include "net/cookies/cookie_monster.h"
 #include "net/http/http_cache.h"
 #include "net/http/http_network_session.h"
 #include "net/url_request/url_request_context.h"
+#include "net/url_request/url_request_interceptor.h"
 #include "net/url_request/url_request_job_factory.h"
 
 class ChromeHttpUserAgentSettings;
 class ChromeNetworkDelegate;
 class ChromeURLRequestContextGetter;
 class CookieSettings;
 class DevToolsNetworkController;
 class HostContentSettingsMap;
 class MediaDeviceIDSalt;
 class ProtocolHandlerRegistry;
@@ skipping 268 matching lines @@
     scoped_ptr<chrome_browser_net::ResourcePrefetchPredictorObserver>
         resource_prefetch_predictor_observer_;
 
     // This pointer exists only as a means of conveying a url job factory
     // pointer from the protocol handler registry on the UI thread to the
     // the URLRequestContext on the IO thread. The consumer MUST take
     // ownership of the object by calling release() on this pointer.
     scoped_ptr<ProtocolHandlerRegistry::JobInterceptorFactory>
         protocol_handler_interceptor;
 
+    // Holds the URLRequestInterceptor pointer that is created on the UI thread
+    // and then passed to the list of request_interceptors on the IO thread.
+    scoped_ptr<net::URLRequestInterceptor> new_tab_page_interceptor;
+
     // We need to initialize the ProxyConfigService from the UI thread
     // because on linux it relies on initializing things through gconf,
     // and needs to be on the main thread.
     scoped_ptr<net::ProxyConfigService> proxy_config_service;
 
 #if defined(ENABLE_SUPERVISED_USERS)
     scoped_refptr<const SupervisedUserURLFilter> supervised_user_url_filter;
 #endif
 
 #if defined(OS_CHROMEOS)
@@ skipping 292 matching lines @@
 
   // TODO(jhawkins): Remove once crbug.com/102004 is fixed.
   bool initialized_on_UI_thread_;
 
   const Profile::ProfileType profile_type_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileIOData);
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_IO_DATA_H_