Add pyauto hook for getting and manipulating the data underneath the NTP.

chrome/common/notification_type.h

 // Copyright (c) 2010 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_COMMON_NOTIFICATION_TYPE_H_
 #define CHROME_COMMON_NOTIFICATION_TYPE_H_
 #pragma once
 
 // This file describes various types used to describe and filter notifications
 // that pass through the NotificationService.
@@ skipping 652 matching lines @@
     // Sent before a Profile is destroyed. The details are
     // none and the source is a Profile*.
     PROFILE_DESTROYED,
 
     // TopSites ----------------------------------------------------------------
 
     // Sent by TopSites when it finishes loading. The source is the profile the
     // details the TopSites.
     TOP_SITES_LOADED,
 
+    // Sent by TopSites when it has finished updating its most visited URLs
+    // cache after querying the history service. The source is the TopSites and
+    // the details a CancelableRequestProvider::Handle from the history service
+    // query.
+    // Used only in testing.
+    TOP_SITES_UPDATED,
+
     // Thumbnails---------------------------------------------------------------
 
     // Sent by the ThumbnailGenerator whenever a render widget host
     // updates its backing store.  The source is the
     // ThumbnailGenerator, and the details are the RenderWidgetHost
     // that notified the ThumbnailGenerator that its backing store was
     // updated.
     THUMBNAIL_GENERATOR_SNAPSHOT_CHANGED,
 
     // Bookmarks ---------------------------------------------------------------
@@ skipping 609 matching lines @@
 };
 
 inline bool operator==(NotificationType::Type a, NotificationType b) {
   return a == b.value;
 }
 inline bool operator!=(NotificationType::Type a, NotificationType b) {
   return a != b.value;
 }
 
 #endif  // CHROME_COMMON_NOTIFICATION_TYPE_H_