De-suck the NTP a bit more:

chrome/browser/dom_ui/shown_sections_handler.cc

 // 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.
 
 #include "chrome/browser/dom_ui/shown_sections_handler.h"
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/string_number_conversions.h"
 #include "base/values.h"
@@ skipping 92 matching lines @@
                                     THUMB | RECENT | TIPS | SYNC | APPS);
 }
 
 // static
 void ShownSectionsHandler::MigrateUserPrefs(PrefService* pref_service,
                                             int old_pref_version,
                                             int new_pref_version) {
   bool changed = false;
   int shown_sections = pref_service->GetInteger(prefs::kNTPShownSections);
 
-  if (old_pref_version < 3) {
-    // At version 3, we added apps. To bring attention to the feature, we start
-    // it off as the only expanded section.
-    shown_sections = APPS;
+  if (old_pref_version < 1) {
+    // TIPS was used in early builds of the NNTP but since it was removed before
+    // Chrome 3.0 we want to ensure that it is shown by default.
+    shown_sections |= TIPS | SYNC;
     changed = true;
   }
 
+  if (old_pref_version < 2) {
+    // LIST is no longer used. Change to THUMB.
+    shown_sections &= ~LIST;
+    shown_sections |= THUMB;
+    changed = true;
+  }
+
   if (changed)
     pref_service->SetInteger(prefs::kNTPShownSections, shown_sections);
 }