media: Remove unneeded RegisterNatives() call

media/midi/midi_output_port_android.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 MEDIA_MIDI_MIDI_OUTPUT_PORT_ANDROID_H_
 #define MEDIA_MIDI_MIDI_OUTPUT_PORT_ANDROID_H_
 
 #include <jni.h>
 #include <stdint.h>
 #include <vector>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/time/time.h"
 
 namespace media {
 namespace midi {
 
 class MidiOutputPortAndroid final {
  public:
   MidiOutputPortAndroid(JNIEnv* env, jobject raw);
   ~MidiOutputPortAndroid();
 
   // Returns the when the operation succeeds or the port is already open.
   bool Open();
   void Close();
   void Send(const std::vector<uint8_t>& data);
 
-  static bool Register(JNIEnv* env);
-
  private:
   base::android::ScopedJavaGlobalRef<jobject> raw_port_;
 };
 
 }  // namespace midi
 }  // namespace media
 
 #endif  // MEDIA_MIDI_MIDI_OUTPUT_PORT_ANDROID_H_