Remove base::android::OnJNIOnLoadRegisterJNI()

base/android/base_jni_onload.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 BASE_ANDROID_BASE_JNI_ONLOAD_H_
 #define BASE_ANDROID_BASE_JNI_ONLOAD_H_
 
 #include <jni.h>
 #include <vector>
 
 #include "base/base_export.h"
 #include "base/callback.h"
 
 namespace base {
 namespace android {
 
-// Returns whether JNI registration succeeded.
-typedef base::Callback<bool(JNIEnv*)> RegisterCallback;
-BASE_EXPORT bool OnJNIOnLoadRegisterJNI(JNIEnv* env);
-
 // Returns whether initialization succeeded.
 BASE_EXPORT bool OnJNIOnLoadInit();
 
 }  // namespace android
 }  // namespace base
 
 #endif  // BASE_ANDROID_BASE_JNI_ONLOAD_H_