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

components/variations/android/variations_seed_bridge.h

 // Copyright 2015 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.
 
 #ifndef COMPONENTS_VARIATIONS_ANDROID_VARIATIONS_SEED_BRIDGE_H_
 #define COMPONENTS_VARIATIONS_ANDROID_VARIATIONS_SEED_BRIDGE_H_
 
 #include <jni.h>
 #include <string>
 
 namespace variations {
 namespace android {
 
 bool RegisterVariationsSeedBridge(JNIEnv* env);
 
 // Return the first run seed data pulled from the Java side of application.
 void GetVariationsFirstRunSeed(std::string* seed_data,
                                std::string* seed_signature,
                                std::string* seed_country);
 
+// Clears first run seed preferences stored on the Java side of Chrome for
+// Android.
+void ClearJavaFirstRunPrefs();
+
+// Marks variations seed as stored to avoid repeated fetches of the seed at
+// the Java side.
+void markVariationsSeedAsStored();
+
 }  // namespace android
 }  // namespace variations
 
 #endif  // COMPONENTS_VARIATIONS_ANDROID_FIRSTRUN_VARIATIONS_SEED_BRIDGE_H_