diff --git a/java/src/com/android/inputmethod/research/ResearchLogger.java b/java/src/com/android/inputmethod/research/ResearchLogger.java
index bd62ca3..3cad2d0 100644
--- a/java/src/com/android/inputmethod/research/ResearchLogger.java
+++ b/java/src/com/android/inputmethod/research/ResearchLogger.java
@@ -407,8 +407,6 @@
             abort();
         }
         requestIndicatorRedraw();
-        mPrefs = prefs;
-        prefsChanged(prefs);
     }
 
     public void presentResearchDialog(final LatinIME latinIME) {
@@ -737,17 +735,6 @@
         "UserFeedback", "FeedbackContents"
     };
 
-    private static final String[] EVENTKEYS_PREFS_CHANGED = {
-        "PrefsChanged", "prefs"
-    };
-    public static void prefsChanged(final SharedPreferences prefs) {
-        final ResearchLogger researchLogger = getInstance();
-        final Object[] values = {
-            prefs
-        };
-        researchLogger.enqueueEvent(EVENTKEYS_PREFS_CHANGED, values);
-    }
-
     // Regular logging methods
 
     private static final String[] EVENTKEYS_MAINKEYBOARDVIEW_PROCESSMOTIONEVENT = {