Make GetApplicationContext return a JavaRef.

media/base/android/media_source_player.cc

 // Copyright (c) 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.
 
 #include "media/base/android/media_source_player.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <limits>
 #include <utility>
@@ skipping 234 matching lines @@
   if (!manager()->RequestPlay(player_id(), duration_, HasAudio())) {
     Pause(true);
     return;
   }
 
   // When we start, we could have new demuxed data coming in. This new data
   // could be clear (not encrypted) or encrypted with different keys. So key
   // related info should all be cleared.
   is_waiting_for_key_ = false;
   key_added_while_decode_pending_ = false;
-  AttachListener(NULL);
+  AttachListener(nullptr);
 
   SetPendingEvent(PREFETCH_REQUEST_EVENT_PENDING);
   ProcessPendingEvents();
 }
 
 void MediaSourcePlayer::OnDemuxerConfigsAvailable(
     const DemuxerConfigs& configs) {
   DVLOG(1) << __FUNCTION__;
   DCHECK(!HasAudio() && !HasVideo());
 
@@ skipping 591 matching lines @@
   is_waiting_for_key_ = false;
   key_added_while_decode_pending_ = false;
 
   // StartInternal() will trigger a prefetch, where in most cases we'll just
   // use previously received data.
   if (playing_)
     StartInternal();
 }
 
 }  // namespace media