jni: Pass method parameters as JavaParamRef in content.

content/browser/media/android/media_session.cc

 // 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 "content/browser/media/android/media_session.h"
 
 #include "base/android/context_utils.h"
 #include "base/android/jni_android.h"
 #include "content/browser/media/android/media_session_observer.h"
 #include "content/browser/web_contents/web_contents_impl.h"
@@ skipping 94 matching lines @@
   for (auto it = players_.begin(); it != players_.end();) {
     if (it->observer == observer)
       players_.erase(it++);
     else
       ++it;
   }
 
   AbandonSystemAudioFocusIfNeeded();
 }
 
-void MediaSession::OnSuspend(JNIEnv* env, jobject obj, jboolean temporary) {
+void MediaSession::OnSuspend(JNIEnv* env,
+                             const JavaParamRef<jobject>& obj,
+                             jboolean temporary) {
   // TODO(mlamouri): this check makes it so that if a MediaSession is paused and
   // then loses audio focus, it will still stay in the Suspended state.
   // See https://crbug.com/539998
   if (audio_focus_state_ != State::ACTIVE)
     return;
 
   OnSuspendInternal(SuspendType::SYSTEM);
   if (!temporary)
     SetAudioFocusState(State::INACTIVE);
 
   uma_helper_.RecordSessionSuspended(
       temporary ? MediaSessionSuspendedSource::SystemTransient
                 : MediaSessionSuspendedSource::SystemPermanent);
   UpdateWebContents();
 }
 
-void MediaSession::OnResume(JNIEnv* env, jobject obj) {
+void MediaSession::OnResume(JNIEnv* env, const JavaParamRef<jobject>& obj) {
   if (audio_focus_state_ != State::SUSPENDED)
     return;
 
   OnResumeInternal(SuspendType::SYSTEM);
   UpdateWebContents();
 }
 
 void MediaSession::Resume() {
   DCHECK(IsSuspended());
 
@@ skipping 138 matching lines @@
     case State::SUSPENDED:
       uma_helper_.OnSessionSuspended();
       break;
     case State::INACTIVE:
       uma_helper_.OnSessionInactive();
       break;
   }
 }
 
 }  // namespace content