Implement local NTP for fallback.

chrome/browser/instant/instant_service.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/instant/instant_service.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/history/history_notifications.h"
 #include "chrome/browser/instant/instant_io_context.h"
 #include "chrome/browser/instant/instant_service_factory.h"
+#include "chrome/browser/instant/local_ntp_source.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/webui/ntp/thumbnail_source.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/url_data_source.h"
 #include "googleurl/src/gurl.h"
 #include "net/url_request/url_request.h"
@@ skipping 32 matching lines @@
   instant_io_context_ = new InstantIOContext();
 
   if (profile_ && profile_->GetResourceContext()) {
     BrowserThread::PostTask(
         BrowserThread::IO, FROM_HERE,
         base::Bind(&InstantIOContext::SetUserDataOnIO,
                    profile->GetResourceContext(), instant_io_context_));
   }
 
   content::URLDataSource::Add(profile, new ThumbnailSource(profile));
+  content::URLDataSource::Add(profile, new LocalNTPSource());
 }
 
 InstantService::~InstantService() {
 }
 
 // static
 const std::string InstantService::MaybeTranslateInstantPathOnUI(
     Profile* profile, const std::string& path) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   InstantService* instant_service =
@@ skipping 157 matching lines @@
         url_to_most_visited_item_id_map_.find(*it);
     if (item != url_to_most_visited_item_id_map_.end()) {
       uint64 most_visited_item_id = item->second;
       url_to_most_visited_item_id_map_.erase(item);
       most_visited_item_id_to_url_map_.erase(
           most_visited_item_id_to_url_map_.find(most_visited_item_id));
       deleted_ids->push_back(most_visited_item_id);
     }
   }
 }