NTP: Allow hiding tips and bookmark sync.

This change adds 2 new menu items to the option menu.

There is pref migration code to make tips and sync visible by default.

BUG=24319

TEST=Hide and show the different sections and reload to make sure it
is persisted across instances of NTP.

Review URL: http://codereview.chromium.org/337011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@30495 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 13 insertions, 1 deletions

diff --git a/chrome/browser/dom_ui/shown_sections_handler.cc b/chrome/browser/dom_ui/shown_sections_handler.cc
index ad05112..d6769b3 100644
--- a/chrome/browser/dom_ui/shown_sections_handler.cc
+++ b/chrome/browser/dom_ui/shown_sections_handler.cc
@@ -47,6 +47,18 @@ void ShownSectionsHandler::HandleSetShownSections(const Value* value) {
 // static
 void ShownSectionsHandler::RegisterUserPrefs(PrefService* prefs) {
   prefs->RegisterIntegerPref(prefs::kNTPShownSections,
-      THUMB | RECENT | TIPS);
+      THUMB | RECENT | TIPS | SYNC);
 }
 
+// static
+void ShownSectionsHandler::MigrateUserPrefs(PrefService* prefs,
+                                            int old_pref_version,
+                                            int new_pref_version) {
+  if (old_pref_version < 1) {
+    int shown_sections = prefs->GetInteger(prefs::kNTPShownSections);
+    // 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;
+    prefs->SetInteger(prefs::kNTPShownSections, shown_sections);
+  }
+}