Android: Update convenience macro defining JNI-accessible methods

webrtc/sdk/android/src/jni/pc/audiotrack_jni.cc

 /*
  *  Copyright 2017 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include "webrtc/api/mediastreaminterface.h"
 #include "webrtc/sdk/android/src/jni/jni_helpers.h"
 
 namespace webrtc_jni {
 
-JOW(void, AudioTrack_nativeSetVolume)
-(JNIEnv*, jclass, jlong j_p, jdouble volume) {
+JNI_FUNCTION_DECLARATION(void,
+                         AudioTrack_nativeSetVolume,
+                         JNIEnv*,
+                         jclass,
+                         jlong j_p,
+                         jdouble volume) {
   rtc::scoped_refptr<webrtc::AudioSourceInterface> source(
       reinterpret_cast<webrtc::AudioTrackInterface*>(j_p)->GetSource());
   source->SetVolume(volume);
 }
 
 }  // namespace webrtc_jni