Implemented clearing Java prefs after pulling variations first run seed from Java to C++ side

components/variations/android/java/src/org/chromium/components/variations/firstrun/VariationsSeedBridge.java

Index: components/variations/android/java/src/org/chromium/components/variations/firstrun/VariationsSeedBridge.java
diff --git a/components/variations/android/java/src/org/chromium/components/variations/firstrun/VariationsSeedBridge.java b/components/variations/android/java/src/org/chromium/components/variations/firstrun/VariationsSeedBridge.java
index 3af546bf3bf62115b4ff37c4ff207f4c58f6a54d..a7d7ba1e0ffb9e04af80a3af6d8f0c33193f6c67 100644
--- a/components/variations/android/java/src/org/chromium/components/variations/firstrun/VariationsSeedBridge.java
+++ b/components/variations/android/java/src/org/chromium/components/variations/firstrun/VariationsSeedBridge.java
@@ -42,6 +42,16 @@ public final class VariationsSeedBridge {
     }
 
     @CalledByNative
+    private static void clearFirstRunPrefs(Context context) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        prefs.edit()
+                .remove(VARIATIONS_FIRST_RUN_SEED_BASE64)
+                .remove(VARIATIONS_FIRST_RUN_SEED_SIGNATURE)
+                .remove(VARIATIONS_FIRST_RUN_SEED_COUNTRY)
+                .apply();
+    }
+
+    @CalledByNative
     private static byte[] getVariationsFirstRunSeedData(Context context) {
         return Base64.decode(
                 getVariationsFirstRunSeedPref(context, VARIATIONS_FIRST_RUN_SEED_BASE64),