Android: Remove unneeded RegisterNatives() calls

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,
                                std::string* response_date,
                                bool* is_gzip_compressed);
 
 // 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();
 
 // Sets test data on the Java side. The data is pulled during the unit tests to
 // C++ side and is being checked for consistency.
 // This method is used for unit testing purposes only.
 void SetJavaFirstRunPrefsForTesting(const std::string& seed_data,
                                     const std::string& seed_signature,
                                     const std::string& seed_country,
                                     const std::string& response_date,
                                     bool is_gzip_compressed);
 
 }  // namespace android
 }  // namespace variations
 
 #endif  // COMPONENTS_VARIATIONS_ANDROID_FIRSTRUN_VARIATIONS_SEED_BRIDGE_H_