Android: Remove unneeded RegisterNatives() calls

content/browser/media/android/media_throttler.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 CONTENT_BROWSER_MEDIA_ANDROID_MEDIA_THROTTLER_H_
 #define CONTENT_BROWSER_MEDIA_ANDROID_MEDIA_THROTTLER_H_
 
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "base/memory/singleton.h"
 
 namespace content {
 
 class MediaThrottler {
  public:
   // Called to get the singleton MediaThrottler instance.
   static MediaThrottler* GetInstance();
 
-  // Jni registration.
-  static bool RegisterMediaThrottler(JNIEnv* env);
-
   virtual ~MediaThrottler();
 
   // Called to request the permission to decode media data. Returns true if
   // permitted, or false otherwise.
   bool RequestDecoderResources();
 
   // Called when a decode request finishes.
   void OnDecodeRequestFinished();
 
   // Resets the throttler to a fresh state.
   void Reset();
 
  private:
   friend struct base::DefaultSingletonTraits<MediaThrottler>;
   MediaThrottler();
 
   base::android::ScopedJavaGlobalRef<jobject> j_media_throttler_;
   DISALLOW_COPY_AND_ASSIGN(MediaThrottler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_ANDROID_MEDIA_THROTTLER_H_