Remove unneeded JNI registrations.

chrome/browser/android/new_tab_page_prefs.h

 // Copyright 2013 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 CHROME_BROWSER_ANDROID_NEW_TAB_PAGE_PREFS_H_
 #define CHROME_BROWSER_ANDROID_NEW_TAB_PAGE_PREFS_H_
 
 #include <jni.h>
 
 #include "chrome/browser/profiles/profile.h"
@@ skipping 18 matching lines @@
                              jobject obj,
                              jboolean is_collapsed);
 
   jboolean GetForeignSessionCollapsed(JNIEnv* env,
                                       jobject obj,
                                       jstring session_tag);
   void SetForeignSessionCollapsed(JNIEnv* env, jobject obj,
                                   jstring session_tag,
                                   jboolean is_collapsed);
 
-  static bool RegisterNewTabPagePrefs(JNIEnv* env);
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
  private:
   virtual ~NewTabPagePrefs();
 
   Profile* profile_;  // weak
   DISALLOW_COPY_AND_ASSIGN(NewTabPagePrefs);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_NEW_TAB_PAGE_PREFS_H_