Fix a reentrance issue in DecryptingDemuxerStream.

content/renderer/media/android/media_source_delegate.cc

Index: content/renderer/media/android/media_source_delegate.cc
diff --git a/content/renderer/media/android/media_source_delegate.cc b/content/renderer/media/android/media_source_delegate.cc
index 67fe5c4e1de6251756fe28be3390671c6ecf7a19..d3298f46d531a4d116b284b518f5f3b7b2be191d 100644
--- a/content/renderer/media/android/media_source_delegate.cc
+++ b/content/renderer/media/android/media_source_delegate.cc
@@ -498,7 +498,7 @@ void MediaSourceDelegate::InitAudioDecryptingDemuxerStream() {
   DCHECK(!set_decryptor_ready_cb_.is_null());
 
   audio_decrypting_demuxer_stream_.reset(new media::DecryptingDemuxerStream(
-      base::MessageLoopProxy::current(), set_decryptor_ready_cb_));
+      media_loop_, set_decryptor_ready_cb_));
   audio_decrypting_demuxer_stream_->Initialize(
       audio_stream_,
       base::Bind(&MediaSourceDelegate::OnAudioDecryptingDemuxerStreamInitDone,
@@ -511,7 +511,7 @@ void MediaSourceDelegate::InitVideoDecryptingDemuxerStream() {
   DCHECK(!set_decryptor_ready_cb_.is_null());
 
   video_decrypting_demuxer_stream_.reset(new media::DecryptingDemuxerStream(
-      base::MessageLoopProxy::current(), set_decryptor_ready_cb_));
+      media_loop_, set_decryptor_ready_cb_));
   video_decrypting_demuxer_stream_->Initialize(
       video_stream_,
       base::Bind(&MediaSourceDelegate::OnVideoDecryptingDemuxerStreamInitDone,