[Sync] Add auto-generated ModelType in Java.

sync/android/sync_jni_registrar.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.
 
-#include "media/base/media_permission.h"
+#ifndef SYNC_JNI_REGISTRAR_H_
+#define SYNC_JNI_REGISTRAR_H_
 
-namespace media {
+#include <jni.h>
 
-MediaPermission::MediaPermission() {
+namespace syncer {
+
+bool RegisterSyncJni(JNIEnv* env);
+
 }
 
-MediaPermission::~MediaPermission() {
-}
-
-}  // namespace media
+#endif  // SYNC_JNI_REGISTRAR_H_