Cleanup of settings menu

- Removed obsolete items
- Rearranged similar items together
- Reduced the depth of menu

Change-Id: I693dbb2b3c8cb244329be965f49ab288b73efa1a
diff --git a/src/com/android/browser/PreferenceKeys.java b/src/com/android/browser/PreferenceKeys.java
index 7dde8b2..f3e752f 100644
--- a/src/com/android/browser/PreferenceKeys.java
+++ b/src/com/android/browser/PreferenceKeys.java
@@ -87,6 +87,7 @@
     // ----------------------
     // Keys for privacy_security_preferences.xml
     // ----------------------
+    static final String PREF_CLEAR_SELECTED_DATA = "privacy_clear_selected";
     static final String PREF_ACCEPT_COOKIES = "accept_cookies";
     static final String PREF_ENABLE_GEOLOCATION = "enable_geolocation";
     static final String PREF_PRIVACY_CLEAR_CACHE = "privacy_clear_cache";